Separate ScrollbarThemeMac into separate files

Source/core/platform/mac/ScrollbarThemeMacOverlayAPI.h

 /*
- * Copyright (c) 2009, Google Inc. All rights reserved.
+ * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
  * copyright notice, this list of conditions and the following disclaimer
  * in the documentation and/or other materials provided with the
  * distribution.
  *     * Neither the name of Google Inc. nor the names of its
  * contributors may be used to endorse or promote products derived from
  * this software without specific prior written permission.
  *
  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
-#ifndef ScrollbarThemeChromiumDefault_h
-#define ScrollbarThemeChromiumDefault_h
+#ifndef ScrollbarThemeMacOverlayAPI_h
+#define ScrollbarThemeMacOverlayAPI_h
 
-#include "core/platform/chromium/ScrollbarThemeChromium.h"
+#include "core/platform/mac/ScrollbarThemeMac.h"
+
+typedef id ScrollbarPainter;
 
 namespace WebCore {
 
-class ScrollbarThemeChromiumDefault : public ScrollbarThemeChromium {
+class ScrollbarThemeMacOverlayAPI : public ScrollbarThemeMacCommon {
 public:
-    virtual int scrollbarThickness(ScrollbarControlSize);
+    virtual void updateEnabledState(ScrollbarThemeClient*);
+    virtual int scrollbarThickness(ScrollbarControlSize = RegularScrollbar);
+    virtual bool usesOverlayScrollbars() const;
+    virtual void updateScrollbarOverlayStyle(ScrollbarThemeClient*);
+    virtual ScrollbarButtonsPlacement buttonsPlacement() const;
+
+    virtual void registerScrollbar(ScrollbarThemeClient*);
+    virtual void unregisterScrollbar(ScrollbarThemeClient*);
+
+    void setNewPainterForScrollbar(ScrollbarThemeClient*, ScrollbarPainter);
+    ScrollbarPainter painterForScrollbar(ScrollbarThemeClient*);
+
+    virtual void paintTrackBackground(GraphicsContext*, ScrollbarThemeClient*, const IntRect&);
+    virtual void paintThumb(GraphicsContext*, ScrollbarThemeClient*, const IntRect&);
 
 protected:
-    virtual void paintTrackPiece(GraphicsContext*, ScrollbarThemeClient*, const IntRect&, ScrollbarPart);
-    virtual void paintButton(GraphicsContext*, ScrollbarThemeClient*, const IntRect&, ScrollbarPart);
-    virtual void paintThumb(GraphicsContext*, ScrollbarThemeClient*, const IntRect&);
-    virtual bool shouldCenterOnThumb(ScrollbarThemeClient*, const PlatformMouseEvent&);
-    virtual IntSize buttonSize(ScrollbarThemeClient*);
+    virtual IntRect trackRect(ScrollbarThemeClient*, bool painting = false);
+    virtual IntRect backButtonRect(ScrollbarThemeClient*, ScrollbarPart, bool painting = false);
+    virtual IntRect forwardButtonRect(ScrollbarThemeClient*, ScrollbarPart, bool painting = false);
+
+    virtual bool hasButtons(ScrollbarThemeClient*) { return false; }
+    virtual bool hasThumb(ScrollbarThemeClient*);
+
     virtual int minimumThumbLength(ScrollbarThemeClient*);
 };
 
-} // namespace WebCore
+}
 
 #endif