[gin] Add flag for V8 Error.stack change

This CL adds a kill switch for https://crrev.com/c/5378709.

R=syg@chromium.org

Bug: 327467399
Change-Id: Ia4d0486d402df8f9cb82a814959c12d84d8a7b74
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5382165
Reviewed-by: Shu-yu Guo <syg@chromium.org>
Auto-Submit: Simon Zünd <szuend@chromium.org>
Commit-Queue: Shu-yu Guo <syg@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1276214}

gin/gin_features.cc

@@ -202,6 +202,10 @@ BASE_FEATURE(kV8UseLibmTrigFunctions,
              "V8UseLibmTrigFunctions",
              base::FEATURE_ENABLED_BY_DEFAULT);
 
+BASE_FEATURE(kV8UseOriginalMessageForStackTrace,
+             "V8UseOriginalMessageForStackTrace",
+             base::FEATURE_ENABLED_BY_DEFAULT);
+
 // Elide redundant TDZ hole checks in bytecode. This only sets the V8 flag when
 // manually overridden.
 BASE_FEATURE(kV8IgnitionElideRedundantTdzChecks,

gin/gin_features.h

@@ -62,6 +62,7 @@ GIN_EXPORT BASE_DECLARE_FEATURE(kV8Turboshaft);
 GIN_EXPORT BASE_DECLARE_FEATURE(kV8TurboshaftInstructionSelection);
 GIN_EXPORT BASE_DECLARE_FEATURE(kV8TurboFastApiCalls);
 GIN_EXPORT BASE_DECLARE_FEATURE(kV8UseLibmTrigFunctions);
+GIN_EXPORT BASE_DECLARE_FEATURE(kV8UseOriginalMessageForStackTrace);
 GIN_EXPORT extern const base::FeatureParam<base::TimeDelta>
     kV8MemoryReducerStartDelay;
 GIN_EXPORT BASE_DECLARE_FEATURE(kJavaScriptRabGsab);

gin/v8_initializer.cc

@@ -428,6 +428,10 @@ void SetFlags(IsolateHolder::ScriptMode mode,
                          "--use-libm-trig-functions",
                          "--no-use-libm-trig-functions");
 
+  SetV8FlagsIfOverridden(features::kV8UseOriginalMessageForStackTrace,
+                         "--use-original-message-for-stack-trace",
+                         "--no-use-original-message-for-stack-trace");
+
   SetV8FlagsIfOverridden(features::kJavaScriptCompileHintsMagic,
                          "--compile-hints-magic", "--no-compile-hints-magic");