Implement frame attribution (FrameBlamer)

content/renderer/renderer_blink_platform_impl.h

Index: content/renderer/renderer_blink_platform_impl.h
diff --git a/content/renderer/renderer_blink_platform_impl.h b/content/renderer/renderer_blink_platform_impl.h
index dc6a81cf9f12bd26a22a362c3a70e8f60981c9af..2652d85fc5d7b8f0de618f4aac71971fc711bc5d 100644
--- a/content/renderer/renderer_blink_platform_impl.h
+++ b/content/renderer/renderer_blink_platform_impl.h
@@ -59,6 +59,7 @@ class QuotaMessageFilter;
 class RendererClipboardDelegate;
 class RenderView;
 class ThreadSafeSender;
+class WebBlameContextImpl;
 class WebClipboardImpl;
 class WebDatabaseObserverImpl;
 class WebFileSystemImpl;
@@ -187,6 +188,7 @@ class CONTENT_EXPORT RendererBlinkPlatformImpl : public BlinkPlatformImpl {
   void vibrate(unsigned int milliseconds) override;
   void cancelVibration() override;
   blink::WebThread* currentThread() override;
+  blink::WebBlameContext* threadBlameContext() override;
   void recordRappor(const char* metric,
                     const blink::WebString& sample) override;
   void recordRapporURL(const char* metric, const blink::WebURL& url) override;
@@ -301,6 +303,8 @@ class CONTENT_EXPORT RendererBlinkPlatformImpl : public BlinkPlatformImpl {
 
   TrialTokenValidator trial_token_validator_;
 
+  scoped_ptr<WebBlameContextImpl> web_blame_context_;
+
   DISALLOW_COPY_AND_ASSIGN(RendererBlinkPlatformImpl);
 };