Don't take a fake UGI every time we execute Javascript.

content/renderer/render_frame_impl.h

Index: content/renderer/render_frame_impl.h
diff --git a/content/renderer/render_frame_impl.h b/content/renderer/render_frame_impl.h
index 9fc05417c912928330233b1b6872a0f3333cc4d4..da481bff9c198854d857aeb622afa916a76257ea 100644
--- a/content/renderer/render_frame_impl.h
+++ b/content/renderer/render_frame_impl.h
@@ -517,6 +517,9 @@ class CONTENT_EXPORT RenderFrameImpl
   void OnJavaScriptExecuteRequest(const base::string16& javascript,
                                   int id,
                                   bool notify_result);
+  void OnJavaScriptExecuteRequestForTests(const base::string16& javascript,
+                                          int id,
+                                          bool notify_result);
   void OnSetEditableSelectionOffsets(int start, int end);
   void OnSetCompositionFromExistingText(
       int start, int end,
@@ -587,6 +590,11 @@ class CONTENT_EXPORT RenderFrameImpl
                                const blink::WebURLError& error,
                                bool replace);
 
+  void HandleJavascriptExecutionResult(const base::string16& javascript,
+                                       int id,
+                                       bool notify_result,
+                                       v8::Handle<v8::Value> result);
+
   // Initializes |web_user_media_client_|. If this fails, because it wasn't
   // possible to create a MediaStreamClient (e.g., WebRTC is disabled), then
   // |web_user_media_client_| will remain NULL.