### Context:
DDC modules are abstractions over how libraries are loaded/updated. The entirety of google3 uses the DDC/legacy module system due to its flexibility extensibility over the other two (ES6 and AMD/RequireJS). Unifying DDC's module system saves us from duplicating work and will allow us to have finer grained control over how JS modules are loaded. This is a a prerequisite to features such as hot reload.
### Overview:
This change plumbs a boolean flag through flutter_tools that switches between DDC (new) and AMD (current) modules. This mode is automatically applied when `--extra-front-end-options=--dartdevc-module-format=ddc` is specified alongside `flutter run`. Other important additions include:
* Splitting Flutter artifacts between DDC and AMD modules
* Adding unit tests for the DDC module system
* Additional bootstrapper logic for the DDC module system
We don't expect to see any user-visible behavior or performance differences.
This is dependent on [incoming module system support in DWDS](https://github.com/dart-lang/webdev/pull/2295) and [additional artifacts in the engine](https://github.com/flutter/engine/pull/47783).
This is part of a greater effort to deprecate the AMD module system: https://github.com/dart-lang/sdk/issues/52361
Bumps [github/codeql-action](https://github.com/github/codeql-action) from 3.24.4 to 3.24.5.
<details>
<summary>Changelog</summary>
<p><em>Sourced from <a href="https://github.com/github/codeql-action/blob/main/CHANGELOG.md">github/codeql-action's changelog</a>.</em></p>
<blockquote>
<h1>CodeQL Action Changelog</h1>
<p>See the <a href="https://github.com/github/codeql-action/releases">releases page</a> for the relevant changes to the CodeQL CLI and language packs.</p>
<p>Note that the only difference between <code>v2</code> and <code>v3</code> of the CodeQL Action is the node version they support, with <code>v3</code> running on node 20 while we continue to release <code>v2</code> to support running on node 16. For example <code>3.22.11</code> was the first <code>v3</code> release and is functionally identical to <code>2.22.11</code>. This approach ensures an easy way to track exactly which features are included in different versions, indicated by the minor and patch version numbers.</p>
<h2>[UNRELEASED]</h2>
<p>No user facing changes.</p>
<h2>3.24.5 - 23 Feb 2024</h2>
<ul>
<li>Update default CodeQL bundle version to 2.16.3. <a href="https://redirect.github.com/github/codeql-action/pull/2156">#2156</a></li>
</ul>
<h2>3.24.4 - 21 Feb 2024</h2>
<ul>
<li>Fix an issue where an existing, but empty, <code>/sys/fs/cgroup/cpuset.cpus</code> file always resulted in a single-threaded run. <a href="https://redirect.github.com/github/codeql-action/pull/2151">#2151</a></li>
</ul>
<h2>3.24.3 - 15 Feb 2024</h2>
<ul>
<li>Fix an issue where the CodeQL Action would fail to load a configuration specified by the <code>config</code> input to the <code>init</code> Action. <a href="https://redirect.github.com/github/codeql-action/pull/2147">#2147</a></li>
</ul>
<h2>3.24.2 - 15 Feb 2024</h2>
<ul>
<li>Enable improved multi-threaded performance on larger runners for GitHub Enterprise Server users. This feature is already available to GitHub.com users. <a href="https://redirect.github.com/github/codeql-action/pull/2141">#2141</a></li>
</ul>
<h2>3.24.1 - 13 Feb 2024</h2>
<ul>
<li>Update default CodeQL bundle version to 2.16.2. <a href="https://redirect.github.com/github/codeql-action/pull/2124">#2124</a></li>
<li>The CodeQL action no longer fails if it can't write to the telemetry api endpoint. <a href="https://redirect.github.com/github/codeql-action/pull/2121">#2121</a></li>
</ul>
<h2>3.24.0 - 02 Feb 2024</h2>
<ul>
<li>CodeQL Python analysis will no longer install dependencies on GitHub Enterprise Server, as is already the case for GitHub.com. See <a href="https://github.com/github/codeql-action/blob/main/#3230---08-jan-2024">release notes for 3.23.0</a> for more details. <a href="https://redirect.github.com/github/codeql-action/pull/2106">#2106</a></li>
</ul>
<h2>3.23.2 - 26 Jan 2024</h2>
<ul>
<li>On Linux, the maximum possible value for the <code>--threads</code> option now respects the CPU count as specified in <code>cgroup</code> files to more accurately reflect the number of available cores when running in containers. <a href="https://redirect.github.com/github/codeql-action/pull/2083">#2083</a></li>
<li>Update default CodeQL bundle version to 2.16.1. <a href="https://redirect.github.com/github/codeql-action/pull/2096">#2096</a></li>
</ul>
<h2>3.23.1 - 17 Jan 2024</h2>
<ul>
<li>Update default CodeQL bundle version to 2.16.0. <a href="https://redirect.github.com/github/codeql-action/pull/2073">#2073</a></li>
<li>Change the retention period for uploaded debug artifacts to 7 days. Previously, this was whatever the repository default was. <a href="https://redirect.github.com/github/codeql-action/pull/2079">#2079</a></li>
</ul>
<h2>3.23.0 - 08 Jan 2024</h2>
<ul>
<li>We are rolling out a feature in January 2024 that will disable Python dependency installation by default for all users. This improves the speed of analysis while having only a very minor impact on results. You can override this behavior by setting <code>CODEQL_ACTION_DISABLE_PYTHON_DEPENDENCY_INSTALLATION=false</code> in your workflow, however we plan to remove this ability in future versions of the CodeQL Action. <a href="https://redirect.github.com/github/codeql-action/pull/2031">#2031</a></li>
<li>The CodeQL Action now requires CodeQL version 2.11.6 or later. For more information, see <a href="https://github.com/github/codeql-action/blob/main/#2227---16-nov-2023">the corresponding changelog entry for CodeQL Action version 2.22.7</a>. <a href="https://redirect.github.com/github/codeql-action/pull/2009">#2009</a></li>
</ul>
</blockquote>
<p>... (truncated)</p>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a href="47b3d888fe"><code>47b3d88</code></a> Merge pull request <a href="https://redirect.github.com/github/codeql-action/issues/2162">#2162</a> from github/update-v3.24.5-a74dcdb05</li>
<li><a href="28c290059f"><code>28c2900</code></a> Update changelog for v3.24.5</li>
<li><a href="a74dcdb056"><code>a74dcdb</code></a> Merge pull request <a href="https://redirect.github.com/github/codeql-action/issues/2160">#2160</a> from github/henrymercer/deptrace-with-build-mode</li>
<li><a href="aeb89ef79a"><code>aeb89ef</code></a> Enable C++ deptrace when using autobuild build mode</li>
<li><a href="2896599ec9"><code>2896599</code></a> Merge pull request <a href="https://redirect.github.com/github/codeql-action/issues/2060">#2060</a> from github/mbg/go/1.22</li>
<li><a href="e3a86ed8b6"><code>e3a86ed</code></a> Add comment justifying why we set <code>cache: false</code></li>
<li><a href="5d55901fc8"><code>5d55901</code></a> Use Go 1.22 in workflows</li>
<li><a href="908a88334d"><code>908a883</code></a> Merge pull request <a href="https://redirect.github.com/github/codeql-action/issues/2158">#2158</a> from github/mergeback/v3.24.4-to-main-e2e140ad</li>
<li><a href="9bce06dffb"><code>9bce06d</code></a> Merge branch 'main' into mergeback/v3.24.4-to-main-e2e140ad</li>
<li><a href="c9f3eed85d"><code>c9f3eed</code></a> Update checked-in dependencies</li>
<li>Additional commits viewable in <a href="e2e140ad14...47b3d888fe">compare view</a></li>
</ul>
</details>
<br />
[](https://docs.github.com/en/github/managing-security-vulnerabilities/about-dependabot-security-updates#about-compatibility-scores)
Dependabot will resolve any conflicts with this PR as long as you don't alter it yourself. You can also trigger a rebase manually by commenting `@dependabot rebase`.
---
<details>
<summary>Dependabot commands and options</summary>
<br />
You can trigger Dependabot actions by commenting on this PR:
- `@dependabot rebase` will rebase this PR
- `@dependabot recreate` will recreate this PR, overwriting any edits that have been made to it
- `@dependabot merge` will merge this PR after your CI passes on it
- `@dependabot squash and merge` will squash and merge this PR after your CI passes on it
- `@dependabot cancel merge` will cancel a previously requested merge and block automerging
- `@dependabot reopen` will reopen this PR if it is closed
- `@dependabot close` will close this PR and stop Dependabot recreating it. You can achieve the same result by closing it manually
- `@dependabot show <dependency name> ignore conditions` will show all of the ignore conditions of the specified dependency
- `@dependabot ignore this major version` will close this PR and stop Dependabot creating any more for this major version (unless you reopen the PR or upgrade to it yourself)
- `@dependabot ignore this minor version` will close this PR and stop Dependabot creating any more for this minor version (unless you reopen the PR or upgrade to it yourself)
- `@dependabot ignore this dependency` will close this PR and stop Dependabot creating any more for this dependency (unless you reopen the PR or upgrade to it yourself)
</details>
The original PR was reverted because the new caret positioning callpath triggered a skparagraph assert. The assert has been removed. Relanding the PR with no changes applied.
This pull request fixes#143803 by taking advantage of Dart's null-aware operators.
And unlike `switch` expressions ([9 PRs](https://github.com/flutter/flutter/pull/143634) and counting), the Flutter codebase is already fantastic when it comes to null-aware coding. After refactoring the entire repo, all the changes involving `?.` and `??` can fit into a single pull request.
Part of https://github.com/flutter/flutter/issues/143616
Without this these tests only run on postsubmit which means we can't get gold results on PRs.
This was reverted because it landed after an engine change that broke flutter tester. That change has since been reverted.
Almost all of our devicelab devices are on iOS 17 now, so let's use them exclusively so we can verify that tests pass consistently on iOS 17.
Fixes https://github.com/flutter/flutter/issues/144020.
https://github.com/flutter/flutter/issues/143956
I still did not include a dartfix since a dartfix that replaces `release` with `dispose` would change the semantics and may cause a runtime crash instead of a build error.
@Piinks does setting `bulkApply` to false force the user to apply the fix to every occurrence one by one in their IDE? If so then it seems that would be the way to go for this deprecation?
Adds a localized Close Button tooltip to the 'X' Button on a SnackBar, making it readable by screen readers.
Github Issue #143793
*If you had to change anything in the [flutter/tests] repo, include a link to the migration guide as per the [breaking change policy].*
Bumps [github/codeql-action](https://github.com/github/codeql-action) from 3.24.3 to 3.24.4.
<details>
<summary>Changelog</summary>
<p><em>Sourced from <a href="https://github.com/github/codeql-action/blob/main/CHANGELOG.md">github/codeql-action's changelog</a>.</em></p>
<blockquote>
<h1>CodeQL Action Changelog</h1>
<p>See the <a href="https://github.com/github/codeql-action/releases">releases page</a> for the relevant changes to the CodeQL CLI and language packs.</p>
<p>Note that the only difference between <code>v2</code> and <code>v3</code> of the CodeQL Action is the node version they support, with <code>v3</code> running on node 20 while we continue to release <code>v2</code> to support running on node 16. For example <code>3.22.11</code> was the first <code>v3</code> release and is functionally identical to <code>2.22.11</code>. This approach ensures an easy way to track exactly which features are included in different versions, indicated by the minor and patch version numbers.</p>
<h2>[UNRELEASED]</h2>
<p>No user facing changes.</p>
<h2>3.24.4 - 21 Feb 2024</h2>
<ul>
<li>Fix an issue where an existing, but empty, <code>/sys/fs/cgroup/cpuset.cpus</code> file always resulted in a single-threaded run. <a href="https://redirect.github.com/github/codeql-action/pull/2151">#2151</a></li>
<li>Update default CodeQL bundle version to 2.16.3. <a href="https://redirect.github.com/github/codeql-action/pull/2156">#2156</a></li>
</ul>
<h2>3.24.3 - 15 Feb 2024</h2>
<ul>
<li>Fix an issue where the CodeQL Action would fail to load a configuration specified by the <code>config</code> input to the <code>init</code> Action. <a href="https://redirect.github.com/github/codeql-action/pull/2147">#2147</a></li>
</ul>
<h2>3.24.2 - 15 Feb 2024</h2>
<ul>
<li>Enable improved multi-threaded performance on larger runners for GitHub Enterprise Server users. This feature is already available to GitHub.com users. <a href="https://redirect.github.com/github/codeql-action/pull/2141">#2141</a></li>
</ul>
<h2>3.24.1 - 13 Feb 2024</h2>
<ul>
<li>Update default CodeQL bundle version to 2.16.2. <a href="https://redirect.github.com/github/codeql-action/pull/2124">#2124</a></li>
<li>The CodeQL action no longer fails if it can't write to the telemetry api endpoint. <a href="https://redirect.github.com/github/codeql-action/pull/2121">#2121</a></li>
</ul>
<h2>3.24.0 - 02 Feb 2024</h2>
<ul>
<li>CodeQL Python analysis will no longer install dependencies on GitHub Enterprise Server, as is already the case for GitHub.com. See <a href="https://github.com/github/codeql-action/blob/main/#3230---08-jan-2024">release notes for 3.23.0</a> for more details. <a href="https://redirect.github.com/github/codeql-action/pull/2106">#2106</a></li>
</ul>
<h2>3.23.2 - 26 Jan 2024</h2>
<ul>
<li>On Linux, the maximum possible value for the <code>--threads</code> option now respects the CPU count as specified in <code>cgroup</code> files to more accurately reflect the number of available cores when running in containers. <a href="https://redirect.github.com/github/codeql-action/pull/2083">#2083</a></li>
<li>Update default CodeQL bundle version to 2.16.1. <a href="https://redirect.github.com/github/codeql-action/pull/2096">#2096</a></li>
</ul>
<h2>3.23.1 - 17 Jan 2024</h2>
<ul>
<li>Update default CodeQL bundle version to 2.16.0. <a href="https://redirect.github.com/github/codeql-action/pull/2073">#2073</a></li>
<li>Change the retention period for uploaded debug artifacts to 7 days. Previously, this was whatever the repository default was. <a href="https://redirect.github.com/github/codeql-action/pull/2079">#2079</a></li>
</ul>
<h2>3.23.0 - 08 Jan 2024</h2>
<ul>
<li>We are rolling out a feature in January 2024 that will disable Python dependency installation by default for all users. This improves the speed of analysis while having only a very minor impact on results. You can override this behavior by setting <code>CODEQL_ACTION_DISABLE_PYTHON_DEPENDENCY_INSTALLATION=false</code> in your workflow, however we plan to remove this ability in future versions of the CodeQL Action. <a href="https://redirect.github.com/github/codeql-action/pull/2031">#2031</a></li>
<li>The CodeQL Action now requires CodeQL version 2.11.6 or later. For more information, see <a href="https://github.com/github/codeql-action/blob/main/#2227---16-nov-2023">the corresponding changelog entry for CodeQL Action version 2.22.7</a>. <a href="https://redirect.github.com/github/codeql-action/pull/2009">#2009</a></li>
</ul>
<h2>3.22.12 - 22 Dec 2023</h2>
<ul>
<li>Update default CodeQL bundle version to 2.15.5. <a href="https://redirect.github.com/github/codeql-action/pull/2047">#2047</a></li>
</ul>
</blockquote>
<p>... (truncated)</p>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a href="e2e140ad14"><code>e2e140a</code></a> Merge pull request <a href="https://redirect.github.com/github/codeql-action/issues/2157">#2157</a> from github/update-v3.24.4-982d9346a</li>
<li><a href="5b1ae298f9"><code>5b1ae29</code></a> Update changelog for v3.24.4</li>
<li><a href="982d9346ad"><code>982d934</code></a> Merge pull request <a href="https://redirect.github.com/github/codeql-action/issues/2111">#2111</a> from github/nickfyson/first-or-third-party</li>
<li><a href="ebda17e859"><code>ebda17e</code></a> respond to review comments</li>
<li><a href="cca1ddefc0"><code>cca1dde</code></a> Merge branch 'main' into nickfyson/first-or-third-party</li>
<li><a href="f32f0bf8e4"><code>f32f0bf</code></a> ensure only the upload-sarif action can submit a status report with first_par...</li>
<li><a href="bf8c75ee37"><code>bf8c75e</code></a> Merge pull request <a href="https://redirect.github.com/github/codeql-action/issues/2153">#2153</a> from github/aeisenberg/add-permissions-doc</li>
<li><a href="36c51ac2b5"><code>36c51ac</code></a> Capitalize Code Scanning</li>
<li><a href="a7dc229496"><code>a7dc229</code></a> add first_party_analysis boolean to all status reports</li>
<li><a href="592977e6ae"><code>592977e</code></a> Merge pull request <a href="https://redirect.github.com/github/codeql-action/issues/2151">#2151</a> from angelapwen/fix-cpu-group-bug</li>
<li>Additional commits viewable in <a href="379614612a...e2e140ad14">compare view</a></li>
</ul>
</details>
<br />
[](https://docs.github.com/en/github/managing-security-vulnerabilities/about-dependabot-security-updates#about-compatibility-scores)
Dependabot will resolve any conflicts with this PR as long as you don't alter it yourself. You can also trigger a rebase manually by commenting `@dependabot rebase`.
---
<details>
<summary>Dependabot commands and options</summary>
<br />
You can trigger Dependabot actions by commenting on this PR:
- `@dependabot rebase` will rebase this PR
- `@dependabot recreate` will recreate this PR, overwriting any edits that have been made to it
- `@dependabot merge` will merge this PR after your CI passes on it
- `@dependabot squash and merge` will squash and merge this PR after your CI passes on it
- `@dependabot cancel merge` will cancel a previously requested merge and block automerging
- `@dependabot reopen` will reopen this PR if it is closed
- `@dependabot close` will close this PR and stop Dependabot recreating it. You can achieve the same result by closing it manually
- `@dependabot show <dependency name> ignore conditions` will show all of the ignore conditions of the specified dependency
- `@dependabot ignore this major version` will close this PR and stop Dependabot creating any more for this major version (unless you reopen the PR or upgrade to it yourself)
- `@dependabot ignore this minor version` will close this PR and stop Dependabot creating any more for this minor version (unless you reopen the PR or upgrade to it yourself)
- `@dependabot ignore this dependency` will close this PR and stop Dependabot creating any more for this dependency (unless you reopen the PR or upgrade to it yourself)
</details>
