Fix the crash that could occur when the window is closed while web contents drag is in progress.

content/browser/web_contents/web_contents_view_android.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_VIEW_ANDROID_H_
 #define CONTENT_BROWSER_WEB_CONTENTS_WEB_CONTENTS_VIEW_ANDROID_H_
 
 #include "base/memory/scoped_ptr.h"
 #include "content/port/browser/render_view_host_delegate_view.h"
 #include "content/public/browser/web_contents_view.h"
@@ skipping 28 matching lines @@
   virtual void GetContainerBounds(gfx::Rect* out) const OVERRIDE;
   virtual void SetPageTitle(const string16& title) OVERRIDE;
   virtual void OnTabCrashed(base::TerminationStatus status,
                             int error_code) OVERRIDE;
   virtual void SizeContents(const gfx::Size& size) OVERRIDE;
   virtual void RenderViewCreated(RenderViewHost* host) OVERRIDE;
   virtual void Focus() OVERRIDE;
   virtual void SetInitialFocus() OVERRIDE;
   virtual void StoreFocus() OVERRIDE;
   virtual void RestoreFocus() OVERRIDE;
-  virtual bool IsDoingDrag() const OVERRIDE;
-  virtual void CancelDragAndCloseTab() OVERRIDE;
   virtual WebDropData* GetDropData() const OVERRIDE;
   virtual bool IsEventTracking() const OVERRIDE;
   virtual void CloseTabAfterEventTracking() OVERRIDE;
   virtual gfx::Rect GetViewBounds() const OVERRIDE;
   virtual void ConfirmTouchEvent(bool handled) OVERRIDE;
 
   // Backend implementation of RenderViewHostDelegateView.
   virtual void ShowContextMenu(
       const ContextMenuParams& params,
       content::ContextMenuSourceType type) OVERRIDE;
@@ skipping 21 matching lines @@
 
   // Interface for extensions to WebContentsView. Used to show the context menu.
   scoped_ptr<WebContentsViewDelegate> delegate_;
 
   DISALLOW_COPY_AND_ASSIGN(WebContentsViewAndroid);
 };
 
 } // namespace content
 
 #endif  // CONTENT_BROWSER_WEB_CONTENTS_WEB_CONTENTS_VIEW_ANDROID_H_