Merge 88396 - 2011-06-08 Sailesh Agrawal <sail@chromium.org>

Source/WebCore/platform/chromium/ScrollbarThemeChromiumMac.h

 /*
  * Copyright (C) 2008 Apple Inc. All Rights Reserved.
  * Copyright (C) 2009 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:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. 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.
  *
  * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``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 APPLE INC. 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 ScrollbarThemeChromiumMac_h
 #define ScrollbarThemeChromiumMac_h
 
+#include "ScrollbarOverlayUtilitiesChromiumMac.h"
 #include "ScrollbarThemeComposite.h"
 
 // This file (and its associated .mm file) is a clone of ScrollbarThemeMac.h.
 // See the .mm file for details.
 
 namespace WebCore {
 
 class ScrollbarThemeChromiumMac : public ScrollbarThemeComposite {
 public:
     ScrollbarThemeChromiumMac();
     virtual ~ScrollbarThemeChromiumMac();
 
     virtual bool paint(Scrollbar*, GraphicsContext* context, const IntRect& damageRect);
 
     virtual int scrollbarThickness(ScrollbarControlSize = RegularScrollbar);
 
     virtual bool supportsControlTints() const { return true; }
+    virtual bool usesOverlayScrollbars() const;
 
     virtual double initialAutoscrollTimerDelay();
     virtual double autoscrollTimerDelay();
 
     virtual ScrollbarButtonsPlacement buttonsPlacement() const;
 
     virtual void registerScrollbar(Scrollbar*);
     virtual void unregisterScrollbar(Scrollbar*);
 
+    void setNewPainterForScrollbar(Scrollbar*, WKScrollbarPainterRef);
+    WKScrollbarPainterRef painterForScrollbar(Scrollbar*);
+
 protected:
     virtual bool hasButtons(Scrollbar*);
     virtual bool hasThumb(Scrollbar*);
 
     virtual IntRect backButtonRect(Scrollbar*, ScrollbarPart, bool painting = false);
     virtual IntRect forwardButtonRect(Scrollbar*, ScrollbarPart, bool painting = false);
     virtual IntRect trackRect(Scrollbar*, bool painting = false);
 
     virtual int minimumThumbLength(Scrollbar*);
 
     virtual bool shouldCenterOnThumb(Scrollbar*, const PlatformMouseEvent&);
+    virtual bool shouldDragDocumentInsteadOfThumb(Scrollbar*, const PlatformMouseEvent&);
 
 public:
     void preferencesChanged();
 };
 
 }
 
 #endif // ScrollbarThemeChromiumMac_h