Make panel adjust bounds per preferred size change notification on Windows.

content/browser/tab_contents/tab_contents_delegate.h

 // Copyright (c) 2011 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_TAB_CONTENTS_TAB_CONTENTS_DELEGATE_H_
 #define CONTENT_BROWSER_TAB_CONTENTS_TAB_CONTENTS_DELEGATE_H_
 #pragma once
 
 #include <set>
 #include <string>
@@ skipping 274 matching lines @@
   // Invoked when navigating to a pending entry. When invoked the
   // NavigationController has configured its pending entry, but it has not yet
   // been committed.
   virtual void DidNavigateToPendingEntry(TabContents* tab);
 
   // Returns a pointer to a service to create JavaScript dialogs. The default
   // pointer returned is to a stub service that marks all dialogs as suppressed
   // and displays nothing.
   virtual content::JavaScriptDialogCreator* GetJavaScriptDialogCreator();
 
+  // Invoked when the preferred size of the contents has been changed.
+  virtual void UpdatePreferredSize(const gfx::Size& pref_size);
+
  protected:
   virtual ~TabContentsDelegate();
 
  private:
   friend class TabContents;
 
   // Called when |this| becomes the TabContentsDelegate for |source|.
   void Attach(TabContents* source);
 
   // Called when |this| is no longer the TabContentsDelegate for |source|.
   void Detach(TabContents* source);
 
   // The TabContents that this is currently a delegate for.
   std::set<TabContents*> attached_contents_;
 };
 
 #endif  // CONTENT_BROWSER_TAB_CONTENTS_TAB_CONTENTS_DELEGATE_H_