[pkg/vm_snapshot_analysis] Allow old 'patched_class_' field.

While in more recent SDK versions the 'patched_class_' field has
been replaced with 'wrapped_class_', this package can still be
used with the earlier SDK versions if we fall back to checking it.

Issue: https://github.com/flutter/flutter/issues/130009
Change-Id: Ifb1250393b72e58bbdc0764c7e2ce96269e659ea
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/312802
Commit-Queue: Tess Strickland <sstrickl@google.com>
Reviewed-by: Martin Kustermann <kustermann@google.com>

pkg/vm_snapshot_analysis/CHANGELOG.md

@@ -1,5 +1,10 @@
 # Changelog
 
+## 0.7.6
+
+- Allow the old `'patched_class_'` field for `PatchClass` until we change the
+  SDK lower bound for this package to a version that does not have it.
+
 ## 0.7.5
 
 - Fix for flutter/flutter#130009 where an attempt to lookup the owner info

pkg/vm_snapshot_analysis/lib/v8_profile.dart

@@ -440,7 +440,10 @@ class _ProgramInfoBuilder {
             type: NodeType.functionNode);
 
       case 'PatchClass':
-        return getInfoNodeFor(node['wrapped_class_']!);
+        // Allow the old patched_class_ field if the wrapped_class_ field does
+        //not exist.
+        final wrappedClass = node['wrapped_class_'] ?? node['patched_class_']!;
+        return getInfoNodeFor(wrappedClass);
 
       case 'Class':
         // Default to root node. Some builtin classes (void, dynamic) don't have

pkg/vm_snapshot_analysis/pubspec.yaml

@@ -1,5 +1,5 @@
 name: vm_snapshot_analysis
-version: 0.7.5
+version: 0.7.6
 description: Utilities for analysing AOT snapshot size.
 repository: https://github.com/dart-lang/sdk/tree/main/pkg/vm_snapshot_analysis