Convert GetPreferredSize from:...

chrome/views/layout_manager.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_VIEWS_LAYOUT_MANAGER_H__
 #define CHROME_VIEWS_LAYOUT_MANAGER_H__
 
 #include <atlbase.h>
 #include <atlapp.h>
 #include <atlmisc.h>
 
+namespace gfx {
+class Size;
+}
+
 namespace ChromeViews {
 
 class View;
 
 /////////////////////////////////////////////////////////////////////////////
 //
 // LayoutManager interface
 //
 //   The LayoutManager interface provides methods to handle the sizing of
 //   the children of a View according to implementation-specific heuristics.
@@ skipping 11 matching lines @@
   // host.
   virtual void Uninstalled(View* host) {}
 
   // Lay out the children of |host| according to implementation-specific
   // heuristics. The graphics used during painting is provided to allow for
   // string sizing.
   virtual void Layout(View* host) = 0;
 
   // Return the preferred size which is the size required to give each
   // children their respective preferred size.
-  virtual void GetPreferredSize(View* host, CSize* out) = 0;
+  virtual gfx::Size GetPreferredSize(View* host) = 0;
 
   // Returns the preferred height for the specified width. The default
   // implementation returns the value from GetPreferredSize.
   virtual int GetPreferredHeightForWidth(View* host, int width);
 
   // Notification that a view has been added.
   virtual void ViewAdded(View* host, View* view) {}
 
   // Notification that a view has been removed.
   virtual void ViewRemoved(View* host, View* view) {}
 };
 
 }
 
 #endif // CHROME_VIEWS_LAYOUT_MANAGER_H__