CRASH at Tab::OnMouseReleased...

chrome/browser/views/tabs/dragged_tab_controller.h

 // Copyright (c) 2006-2008 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_VIEWS_TABS_DRAGGED_TAB_CONTROLLER_H_
 #define CHROME_BROWSER_VIEWS_TABS_DRAGGED_TAB_CONTROLLER_H_
 
 #include "base/gfx/rect.h"
 #include "base/message_loop.h"
 #include "base/timer.h"
@@ skipping 39 matching lines @@
   void CaptureDragInfo(const gfx::Point& mouse_offset);
 
   // Responds to drag events subsequent to StartDrag. If the mouse moves a
   // sufficient distance before the mouse is released, a drag session is
   // initiated.
   void Drag();
 
   // Complete the current drag session. If the drag session was canceled
   // because the user pressed Escape or something interrupted it, |canceled|
   // is true so the helper can revert the state to the world before the drag
-  // begun.
-  void EndDrag(bool canceled);
+  // begun. Returns whether the tab has been destroyed.
+  bool EndDrag(bool canceled);
 
   // Retrieve the source Tab if the TabContents specified matches the one being
   // dragged by this controller, or NULL if the specified TabContents is not
   // the same as the one being dragged.
   Tab* GetDragSourceTabForContents(TabContents* contents) const;
 
   // Returns true if the specified Tab matches the Tab being dragged.
   bool IsDragSourceTab(Tab* tab) const;
 
  private:
@@ skipping 107 matching lines @@
   gfx::Rect GetDraggedViewTabStripBounds(const gfx::Point& screen_point);
 
   // Get the position of the dragged tab view relative to the attached tab
   // strip.
   gfx::Point GetDraggedViewPoint(const gfx::Point& screen_point);
 
   // Finds the Tab within the specified TabStrip that corresponds to the
   // dragged TabContents.
   Tab* GetTabMatchingDraggedContents(TabStrip* tabstrip) const;
 
-  // Does the work for EndDrag.
-  void EndDragImpl(EndDragType how_end);
+  // Does the work for EndDrag. Returns whether the tab has been destroyed.
+  bool EndDragImpl(EndDragType how_end);
 
   // If the drag was aborted for some reason, this function is called to un-do
   // the changes made during the drag operation.
   void RevertDrag();
 
   // Finishes the drag operation. Returns true if the drag controller should
   // be destroyed immediately, false otherwise.
   bool CompleteDrag();
 
   // Create the DraggedTabView, if it does not yet exist.
@@ skipping 100 matching lines @@
 
   // Timer used to bring the window under the cursor to front. If the user
   // stops moving the mouse for a brief time over a browser window, it is
   // brought to front.
   base::OneShotTimer<DraggedTabController> bring_to_front_timer_;
 
   DISALLOW_COPY_AND_ASSIGN(DraggedTabController);
 };
 
 #endif  // CHROME_BROWSER_VIEWS_TABS_DRAGGED_TAB_CONTROLLER_H_