Remove RenderViewHost parameter from WebContentsObserver::Did{Start|Stop}Loading.

chrome/browser/background/background_contents.h

 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CHROME_BROWSER_BACKGROUND_BACKGROUND_CONTENTS_H_
 #define CHROME_BROWSER_BACKGROUND_BACKGROUND_CONTENTS_H_
 
 #include <string>
 
 #include "base/memory/scoped_ptr.h"
@@ skipping 63 matching lines @@
   void AddNewContents(content::WebContents* source,
                       content::WebContents* new_contents,
                       WindowOpenDisposition disposition,
                       const gfx::Rect& initial_rect,
                       bool user_gesture,
                       bool* was_blocked) override;
   bool IsNeverVisible(content::WebContents* web_contents) override;
 
   // content::WebContentsObserver implementation:
   void RenderProcessGone(base::TerminationStatus status) override;
-  void DidStartLoading(content::RenderViewHost* render_view_host) override;
-  void DidStopLoading(content::RenderViewHost* render_view_host) override;
+  void DidStartLoading() override;
+  void DidStopLoading() override;
 
   // content::NotificationObserver
   void Observe(int type,
                const content::NotificationSource& source,
                const content::NotificationDetails& details) override;
 
  protected:
   // Exposed for testing.
   BackgroundContents();
 
@@ skipping 29 matching lines @@
   BackgroundContents* contents;
 
   // The name of the parent frame for these contents.
   const base::string16& frame_name;
 
   // The ID of the parent application (if any).
   const base::string16& application_id;
 };
 
 #endif  // CHROME_BROWSER_BACKGROUND_BACKGROUND_CONTENTS_H_