cc: Remove all remaining use of WebCore Rect/Point/Size types from the compositor.

cc/scrollbar_geometry_fixed_thumb.h

 // Copyright 2012 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 CC_SCROLLBAR_GEOMETRY_FIXED_THUMB_H_
 #define CC_SCROLLBAR_GEOMETRY_FIXED_THUMB_H_
 
-#include "IntSize.h"
 #include "cc/cc_export.h"
 #include "cc/scrollbar_geometry_stub.h"
+#include "ui/gfx/size.h"
 
 namespace cc {
 
 // This scrollbar geometry class behaves exactly like a normal geometry except
 // it always returns a fixed thumb length. This allows a page to zoom (changing
 // the total size of the scrollable area, changing the thumb length) while not
 // requiring the thumb resource to be repainted.
 class CC_EXPORT ScrollbarGeometryFixedThumb : public ScrollbarGeometryStub {
 public:
     static scoped_ptr<ScrollbarGeometryFixedThumb> create(scoped_ptr<WebKit::WebScrollbarThemeGeometry>);
     virtual ~ScrollbarGeometryFixedThumb();
 
     // Update thumb length from scrollbar
     void update(WebKit::WebScrollbar*);
 
     // WebScrollbarThemeGeometry interface
     virtual WebKit::WebScrollbarThemeGeometry* clone() const OVERRIDE;
     virtual int thumbLength(WebKit::WebScrollbar*) OVERRIDE;
     virtual int thumbPosition(WebKit::WebScrollbar*) OVERRIDE;
     virtual void splitTrack(WebKit::WebScrollbar*, const WebKit::WebRect& track, WebKit::WebRect& startTrack, WebKit::WebRect& thumb, WebKit::WebRect& endTrack) OVERRIDE;
 
 private:
     explicit ScrollbarGeometryFixedThumb(scoped_ptr<WebKit::WebScrollbarThemeGeometry>);
 
-    IntSize m_thumbSize;
+    gfx::Size m_thumbSize;
 };
 
 }
 
 #endif  // CC_SCROLLBAR_GEOMETRY_FIXED_THUMB_H_