Add TimeToScrollUpdateSwapBegin2 in RAPPOR

content/browser/renderer_host/render_widget_host_delegate.h

Index: content/browser/renderer_host/render_widget_host_delegate.h
diff --git a/content/browser/renderer_host/render_widget_host_delegate.h b/content/browser/renderer_host/render_widget_host_delegate.h
index 09cee961abb013eb04e4dbd82beb59e134eb3999..91905a7fa9c09eea07eb675b380953f47c82a2a8 100644
--- a/content/browser/renderer_host/render_widget_host_delegate.h
+++ b/content/browser/renderer_host/render_widget_host_delegate.h
@@ -30,6 +30,10 @@ class Rect;
 class Size;
 }
 
+namespace rappor {
+class RapporService;
+}
+
 namespace content {
 
 class BrowserAccessibilityManager;
@@ -216,6 +220,13 @@ class CONTENT_EXPORT RenderWidgetHostDelegate {
   // fullscreen, and will return nullptr for those cases.
   virtual RenderWidgetHostImpl* GetFullscreenRenderWidgetHost() const;
 
+  // Returns the Rappor service from browser process for the metric reporting
+  // purposes per url. See getRapporCommittedUrl for getting the url.
+  virtual ::rappor::RapporService* getRapporService();
+
+  // Returns the Url of the current page to be used in Rappor metric reporting.
+  virtual std::string getRapporCommittedUrl();
+
  protected:
   virtual ~RenderWidgetHostDelegate() {}
 };