Add frameId to MessageSender (extension messaging API)

chrome/browser/tab_contents/tab_util.h

Index: chrome/browser/tab_contents/tab_util.h
diff --git a/chrome/browser/tab_contents/tab_util.h b/chrome/browser/tab_contents/tab_util.h
index 7c6111cc84646c8496e141985a1cf96b94457aee..4814c85ebb0422ce4bf9dc752bc4a7c57127a641 100644
--- a/chrome/browser/tab_contents/tab_util.h
+++ b/chrome/browser/tab_contents/tab_util.h
@@ -21,6 +21,9 @@ namespace tab_util {
 content::WebContents* GetWebContentsByID(int render_process_id,
                                          int render_view_id);
 
+content::WebContents* GetWebContentsByFrameID(int render_process_id,
+                                              int render_frame_id);
+
 // Returns a new SiteInstance for WebUI and app URLs. Returns NULL otherwise.
 content::SiteInstance* GetSiteInstanceForNewTab(
     Profile* profile,