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

chrome/browser/ui/tab_contents/core_tab_helper.h

 // Copyright (c) 2012 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_UI_TAB_CONTENTS_CORE_TAB_HELPER_H_
 #define CHROME_BROWSER_UI_TAB_CONTENTS_CORE_TAB_HELPER_H_
 
 #include "base/time/time.h"
 #include "content/public/browser/web_contents_observer.h"
 #include "content/public/browser/web_contents_user_data.h"
@@ skipping 41 matching lines @@
   int content_restrictions() const { return content_restrictions_; }
 
  private:
   explicit CoreTabHelper(content::WebContents* web_contents);
   friend class content::WebContentsUserData<CoreTabHelper>;
 
   static bool GetStatusTextForWebContents(base::string16* status_text,
                                           content::WebContents* source);
 
   // content::WebContentsObserver overrides:
-  void DidStartLoading(content::RenderViewHost* render_view_host) override;
+  void DidStartLoading() override;
   void WasShown() override;
   void WebContentsDestroyed() override;
   void BeforeUnloadFired(const base::TimeTicks& proceed_time) override;
   void BeforeUnloadDialogCancelled() override;
   bool OnMessageReceived(const IPC::Message& message,
                          content::RenderFrameHost* render_frame_host) override;
 
   void OnRequestThumbnailForContextNodeACK(const std::string& thumbnail_data,
                                            const gfx::Size& original_size);
 
@@ skipping 14 matching lines @@
   base::TimeTicks unload_detached_start_time_;
 
   // Content restrictions, used to disable print/copy etc based on content's
   // (full-page plugins for now only) permissions.
   int content_restrictions_;
 
   DISALLOW_COPY_AND_ASSIGN(CoreTabHelper);
 };
 
 #endif  // CHROME_BROWSER_UI_TAB_CONTENTS_CORE_TAB_HELPER_H_