Ensure fullscreen mode is exited for same-site navigations.

content/browser/web_contents/web_contents_impl.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 CONTENT_BROWSER_WEB_CONTENTS_WEB_CONTENTS_IMPL_H_
 #define CONTENT_BROWSER_WEB_CONTENTS_WEB_CONTENTS_IMPL_H_
 
 #include <map>
 #include <set>
 #include <string>
@@ skipping 436 matching lines @@
       const base::string16& error_description) OVERRIDE;
   virtual void DidRedirectProvisionalLoad(
       RenderFrameHostImpl* render_frame_host,
       const GURL& validated_target_url) OVERRIDE;
   virtual void DidCommitProvisionalLoad(
       RenderFrameHostImpl* render_frame_host,
       const base::string16& frame_unique_name,
       bool is_main_frame,
       const GURL& url,
       PageTransition transition_type) OVERRIDE;
+  virtual void DidNavigateMainFramePreCommit(
+      const FrameHostMsg_DidCommitProvisionalLoad_Params& params) OVERRIDE;
   virtual void DidNavigateMainFramePostCommit(
       const LoadCommittedDetails& details,
       const FrameHostMsg_DidCommitProvisionalLoad_Params& params) OVERRIDE;
   virtual void DidNavigateAnyFramePostCommit(
       RenderFrameHostImpl* render_frame_host,
       const LoadCommittedDetails& details,
       const FrameHostMsg_DidCommitProvisionalLoad_Params& params) OVERRIDE;
   virtual void SetMainFrameMimeType(const std::string& mime_type) OVERRIDE;
   virtual bool CanOverscrollContent() OVERRIDE;
   virtual void NotifyChangedNavigationState(
@@ skipping 582 matching lines @@
   // Whether this WebContents is responsible for displaying a subframe in a
   // different process from its parent page.
   bool is_subframe_;
 
   DISALLOW_COPY_AND_ASSIGN(WebContentsImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_WEB_CONTENTS_WEB_CONTENTS_IMPL_H_