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

content/public/browser/web_contents_view.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_PUBLIC_BROWSER_WEB_CONTENTS_VIEW_H_
 #define CONTENT_PUBLIC_BROWSER_WEB_CONTENTS_VIEW_H_
 
 #include <string>
 
 #include "base/basictypes.h"
@@ skipping 80 matching lines @@
   // first time.
   virtual void SetInitialFocus() = 0;
 
   // Stores the currently focused view.
   virtual void StoreFocus() = 0;
 
   // Restores focus to the last focus view. If StoreFocus has not yet been
   // invoked, SetInitialFocus is invoked.
   virtual void RestoreFocus() = 0;
 
-  // If we try to close the tab while a drag is in progress, we crash.  These
-  // methods allow the WebContents to determine if a drag is in progress and
-  // postpone the tab closing.
-  virtual bool IsDoingDrag() const = 0;
-  virtual void CancelDragAndCloseTab() = 0;
-
   // Returns the current drop data, if any.
   virtual WebDropData* GetDropData() const = 0;
 
   // If we close the tab while a UI control is in an event-tracking
   // loop, the control may message freed objects and crash.
   // WebContents::Close() calls IsEventTracking(), and if it returns
   // true CloseTabAfterEventTracking() is called and the close is not
   // completed.
   virtual bool IsEventTracking() const = 0;
   virtual void CloseTabAfterEventTracking() = 0;
 
   // Get the bounds of the View, relative to the parent.
   virtual gfx::Rect GetViewBounds() const = 0;
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_BROWSER_WEB_CONTENTS_VIEW_H_