[VM] Add dependencies needed to generate protozero code

This adds dependencies on the perfetto, protobuf, and protobuf-gn repos on fuchsia.googlesource.com.

Change-Id: Ib196587e4cacb7e95c5ca284539fcd578d09d16b
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/278200
Commit-Queue: Derek Xu <derekx@google.com>
Reviewed-by: Ben Konyi <bkonyi@google.com>
Reviewed-by: Siva Annamalai <asiva@google.com>

DEPS

@@ -97,8 +97,11 @@ vars = {
   "gperftools_revision": "bf8b714bf5075d0a6f2f28504b43095e2b1e11c5",
   "icu_rev": "81d656878ec611cb0b42d52c82e9dae93920d9ba",
   "jinja2_rev": "2222b31554f03e62600cd7e383376a7c187967a1",
+  "libprotobuf_rev": "24487dd1045c7f3d64a21f38a3f0c06cc4cf2edb",
   "markupsafe_rev": "8f45f5cfa0009d2a70589bcda0349b8cb2b72783",
+  "perfetto_rev": "b8da07095979310818f0efde2ef3c69ea70d62c5",
   "ply_rev": "604b32590ffad5cbb82e4afef1d305512d06ae93",
+  "protobuf_gn_rev": "b9517855b24624ec4edf4a11c1b7060f4ef237e6",
   "root_certificates_rev": "692f6d6488af68e0121317a9c2c9eb393eb0ee50",
   "WebCore_rev": "bcb10901266c884e7b3740abc597ab95373ab55c",
   "zlib_rev": "27c2f474b71d0d20764f86f60ef8b00da1a16cda",
@@ -301,10 +304,23 @@ deps = {
       Var("chromium_git") + "/chromium/src/third_party/jinja2.git" +
       "@" + Var("jinja2_rev"),
 
+  Var("dart_root") + "/third_party/perfetto":
+      Var("fuchsia_git") +
+      "/third_party/android.googlesource.com/platform/external/perfetto" +
+      "@" + Var("perfetto_rev"),
+
   Var("dart_root") + "/third_party/ply":
       Var("chromium_git") + "/chromium/src/third_party/ply.git" +
       "@" + Var("ply_rev"),
 
+  Var("dart_root") + "/build/secondary/third_party/protobuf":
+      Var("fuchsia_git") + "/protobuf-gn" +
+      "@" + Var("protobuf_gn_rev"),
+
+  Var("dart_root") + "/third_party/protobuf":
+      Var("fuchsia_git") + "/third_party/protobuf" +
+      "@" + Var("libprotobuf_rev"),
+
   Var("dart_root") + "/third_party/icu":
       Var("chromium_git") + "/chromium/deps/icu.git" +
       "@" + Var("icu_rev"),

build/config/BUILDCONFIG.gn

@@ -136,6 +136,10 @@ declare_args() {
 
   # Compile for execution in user-mode QEMU.
   is_qemu = false
+
+  # protobuf-gn fails to build if this argument isn't defined. This should never
+  # be set to true, becuase we never build within the Fuchsia tree.
+  is_fuchsia_tree = false
 }
 
 # =============================================================================

build/config/sanitizers/sanitizers.gni

@@ -18,4 +18,8 @@ declare_args() {
   # standard system libraries. Set this flag to download prebuilt binaries from
   # GCS.
   use_prebuilt_instrumented_libraries = false
+
+  # Perfetto targets fail to build if this argument isn't defined. When true,
+  # the preprocessor macro ADDRESS_SANITIZER_WITHOUT_INSTRUMENTATION is defined.
+  use_sanitizer_configs_without_instrumentation = false
 }

build/secondary/build/test.gni

@@ -0,0 +1,11 @@
+# Copyright (c) 2023, the Dart project authors. Please see the AUTHORS file for
+# details. All rights reserved. Use of this source code is governed by a
+# BSD-style license that can be found in the LICENSE file.
+
+# protobuf-gn fails to build without this stub.
+template("test") {
+  group(target_name) {
+    not_needed(invoker, "*")
+    testonly = true
+  }
+}

build/secondary/build_overrides/build.gni

@@ -0,0 +1,8 @@
+# Copyright (c) 2023, the Dart project authors. Please see the AUTHORS file for
+# details. All rights reserved. Use of this source code is governed by a
+# BSD-style license that can be found in the LICENSE file.
+
+# Perfetto targets fail to build without this variable. It is used by Perfetto
+# targets to distinguish embedder builds from Perfetto standalone builds, and
+# builds in the Android tree.
+perfetto_build_with_embedder = true

build/secondary/testing/gmock/BUILD.gn

@@ -0,0 +1,8 @@
+# Copyright (c) 2023, the Dart project authors. Please see the AUTHORS file for
+# details. All rights reserved. Use of this source code is governed by a
+# BSD-style license that can be found in the LICENSE file.
+
+# Perfetto targets fail to build without this stub.
+group("gmock") {
+  testonly = true
+}

build/secondary/testing/gtest/BUILD.gn

@@ -0,0 +1,11 @@
+# Copyright (c) 2023, the Dart project authors. Please see the AUTHORS file for
+# details. All rights reserved. Use of this source code is governed by a
+# BSD-style license that can be found in the LICENSE file.
+
+# Perfetto targets fail to build without these two stubs.
+group("gtest") {
+  testonly = true
+}
+group("gtest_main") {
+  testonly = true
+}

build/secondary/third_party/.gitignore

@@ -0,0 +1,2 @@
+# Ignore protobuf directory because it is retrieved by gclient sync.
+protobuf/

third_party/.gitignore

@@ -1,7 +1,6 @@
 # ignore everything
 *
-# except for items in the pkg directory and self.
-# except for our files in boringssl.  The checkout is in boringssl/src.
+# except for the following files and directories:
 !.gitignore
 !pkg
 !/tcmalloc
@@ -13,3 +12,11 @@
 !/wasmer
 # but ignore a subfolder of tcmalloc (some client ignores /tcmalloc/.gitignore)
 /tcmalloc/gperftools
+# custom_options.proto needs to be checked in because it is a stub we define
+# ourselves to prevent the "all" ninja target from breaking.
+!protobuf/
+protobuf/*
+!protobuf/src/
+protobuf/src/*
+!protobuf/src/test/
+!protobuf/src/test/custom_options.proto

third_party/protobuf/src/test/custom_options.proto

@@ -0,0 +1,12 @@
+/*
+ * Copyright (c) 2023, the Dart project authors. Please see the AUTHORS
+ * file for details. All rights reserved. Use of this source code is
+ * governed by a BSD-style license that can be found in the LICENSE
+ * file.
+ */
+
+// protobuf-gn defines a "custom_options_proto" target that references
+// this file, so this stub is required to prevent the "all" Ninja target
+// from breaking.
+
+syntax = "proto3";