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

chrome/browser/prerender/prerender_contents.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_PRERENDER_PRERENDER_CONTENTS_H_
 #define CHROME_BROWSER_PRERENDER_PRERENDER_CONTENTS_H_
 
 #include <string>
 #include <utility>
 #include <vector>
@@ skipping 177 matching lines @@
   base::TimeTicks load_start_time() const { return load_start_time_; }
 
   // Indicates whether this prerendered page can be used for the provided
   // |url| and |session_storage_namespace|.
   bool Matches(
       const GURL& url,
       const content::SessionStorageNamespace* session_storage_namespace) const;
 
   // content::WebContentsObserver implementation.
   void RenderFrameCreated(content::RenderFrameHost* render_frame_host) override;
-  void DidStopLoading(content::RenderViewHost* render_view_host) override;
+  void DidStopLoading() override;
   void DocumentLoadedInFrame(
       content::RenderFrameHost* render_frame_host) override;
   void DidStartProvisionalLoadForFrame(
       content::RenderFrameHost* render_frame_host,
       const GURL& validated_url,
       bool is_error_page,
       bool is_iframe_srcdoc) override;
   void DidFinishLoad(content::RenderFrameHost* render_frame_host,
                      const GURL& validated_url) override;
   void DidNavigateMainFrame(
@@ skipping 200 matching lines @@
   // A running tally of the number of bytes this prerender has caused to be
   // transferred over the network for resources.  Updated with AddNetworkBytes.
   int64 network_bytes_;
 
   DISALLOW_COPY_AND_ASSIGN(PrerenderContents);
 };
 
 }  // namespace prerender
 
 #endif  // CHROME_BROWSER_PRERENDER_PRERENDER_CONTENTS_H_