Implement frame attribution (FrameBlamer)

third_party/WebKit/Source/bindings/core/v8/V8PerIsolateData.h

Index: third_party/WebKit/Source/bindings/core/v8/V8PerIsolateData.h
diff --git a/third_party/WebKit/Source/bindings/core/v8/V8PerIsolateData.h b/third_party/WebKit/Source/bindings/core/v8/V8PerIsolateData.h
index 5d709e7367293085c003c595ad0c0f1b76dbdd35..6089807eb8783a99507011983a1fecdfba75b3bb 100644
--- a/third_party/WebKit/Source/bindings/core/v8/V8PerIsolateData.h
+++ b/third_party/WebKit/Source/bindings/core/v8/V8PerIsolateData.h
@@ -33,6 +33,7 @@
 #include "core/CoreExport.h"
 #include "gin/public/isolate_holder.h"
 #include "gin/public/v8_idle_task_runner.h"
+#include "public/platform/Platform.h"
 #include "wtf/HashMap.h"
 #include "wtf/Noncopyable.h"
 #include "wtf/OwnPtr.h"
@@ -48,7 +49,8 @@ struct WrapperTypeInfo;
 
 typedef WTF::Vector<DOMDataStore*> DOMDataStoreList;
 
-class CORE_EXPORT V8PerIsolateData {
+class CORE_EXPORT V8PerIsolateData
+    : public Platform::TraceLogEnabledStateObserver {
     USING_FAST_MALLOC(V8PerIsolateData);
     WTF_MAKE_NONCOPYABLE(V8PerIsolateData);
 public:
@@ -122,6 +124,10 @@ public:
     void setThreadDebugger(PassOwnPtr<ThreadDebugger>);
     ThreadDebugger* threadDebugger();
 
+    // Platform::TraceLogEnabledStateObserver methods:
+    void onTraceLogEnabled() override;
+    void onTraceLogDisabled() override;
+
 private:
     V8PerIsolateData();
     ~V8PerIsolateData();