Fix a crash in chrome.exe caused by the external tab container instance getti...

chrome/browser/external_tab_container.h

Index: chrome/browser/external_tab_container.h
===================================================================
--- chrome/browser/external_tab_container.h	(revision 10800)
+++ chrome/browser/external_tab_container.h	(working copy)
@@ -41,7 +41,6 @@
   BEGIN_MSG_MAP(ExternalTabContainer)
     MESSAGE_HANDLER(WM_SIZE, OnSize)
     MESSAGE_HANDLER(WM_SETFOCUS, OnSetFocus)
-    MSG_WM_DESTROY(OnDestroy)
   END_MSG_MAP()
 
   DECLARE_WND_CLASS(chrome::kExternalTabWindowClass)
@@ -56,6 +55,11 @@
   bool Init(Profile* profile, HWND parent, const gfx::Rect& dimensions,
             unsigned int style);
 
+  // This function gets called from two places, which is fine.
+  // 1. OnFinalMessage
+  // 2. In the destructor.
+  bool Uninitialize(HWND window);
+
   // Overridden from TabContentsDelegate:
   virtual void OpenURLFromTab(TabContents* source,
                               const GURL& url,