Fix a crash that happens if a tab is closed while

chrome/browser/views/tab_contents/tab_contents_view_win.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_TAB_CONTENTS_TAB_CONTENTS_VIEW_WIN_H_
 #define CHROME_BROWSER_VIEWS_TAB_CONTENTS_TAB_CONTENTS_VIEW_WIN_H_
 
 #include "base/gfx/size.h"
 #include "base/scoped_ptr.h"
+#include "base/timer.h"
 #include "chrome/browser/tab_contents/tab_contents_view.h"
 #include "views/widget/widget_win.h"
 
 class RenderViewContextMenuWin;
 class SadTabView;
 struct WebDropData;
+class WebDragSource;
 class WebDropTarget;
 
 // Windows-specific implementation of the TabContentsView. It is a HWND that
 // contains all of the contents of the tab and associated child views.
 class TabContentsViewWin : public TabContentsView,
                            public views::WidgetWin {
  public:
   // The corresponding TabContents is passed in the constructor, and manages our
   // lifetime. This doesn't need to be the case, but is this way currently
   // because that's what was easiest when they were split.
@@ skipping 14 matching lines @@
   virtual gfx::NativeWindow GetTopLevelNativeWindow() const;
   virtual void GetContainerBounds(gfx::Rect* out) const;
   virtual void OnContentsDestroy();
   virtual void SetPageTitle(const std::wstring& title);
   virtual void OnTabCrashed();
   virtual void SizeContents(const gfx::Size& size);
   virtual void Focus();
   virtual void SetInitialFocus();
   virtual void StoreFocus();
   virtual void RestoreFocus();
+  virtual bool IsDoingDrag() const;
+  virtual void CancelDragAndCloseTab();
 
   // Backend implementation of RenderViewHostDelegate::View.
   virtual void ShowContextMenu(const ContextMenuParams& params);
   virtual void StartDragging(const WebDropData& drop_data);
   virtual void UpdateDragCursor(bool is_drop_target);
   virtual void GotFocus();
   virtual void TakeFocus(bool reverse);
   virtual void HandleKeyboardEvent(const NativeWebKeyboardEvent& event);
 
   // WidgetWin overridde.
   virtual views::FocusManager* GetFocusManager();
 
  private:
+  // A helper method for closing the tab.
+  void CloseTab();
+
   // Windows events ------------------------------------------------------------
 
   // Overrides from WidgetWin.
   virtual void OnDestroy();
   virtual void OnHScroll(int scroll_type, short position, HWND scrollbar);
   virtual void OnMouseLeave();
   virtual LRESULT OnMouseRange(UINT msg, WPARAM w_param, LPARAM l_param);
   virtual void OnPaint(HDC junk_dc);
   virtual LRESULT OnReflectedMessage(UINT msg, WPARAM w_param, LPARAM l_param);
   virtual void OnVScroll(int scroll_type, short position, HWND scrollbar);
@@ skipping 35 matching lines @@
   // The id used in the ViewStorage to store the last focused view.
   int last_focused_view_storage_id_;
 
   // The context menu. Callbacks are asynchronous so we need to keep it around.
   scoped_ptr<RenderViewContextMenuWin> context_menu_;
 
   // The FocusManager associated with this tab.  Stored as it is not directly
   // accessible when unparented.
   views::FocusManager* focus_manager_;
 
+  // |drag_source_| is our callback interface passed to the system when we
+  // want to initiate a drag and drop operation.  We use it to tell if a
+  // drag operation is happening.
+  scoped_refptr<WebDragSource> drag_source_;
+
+  // Set to true if we want to close the tab after the system drag operation
+  // has finished.
+  bool close_tab_after_drag_ends_;
+
+  // Used to close the tab after the stack has unwound.
+  base::OneShotTimer<TabContentsViewWin> close_tab_timer_;
+
   DISALLOW_COPY_AND_ASSIGN(TabContentsViewWin);
 };
 
 #endif  // CHROME_BROWSER_VIEWS_TAB_CONTENTS_TAB_CONTENTS_VIEW_WIN_H_