Fix remaining cc files to compile with Clang

cc/ScrollbarLayerChromium.cpp

 // 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.
 
 #include "config.h"
 
 #if USE(ACCELERATED_COMPOSITING)
 
 #include "ScrollbarLayerChromium.h"
 
@@ skipping 20 matching lines @@
 
 ScrollbarLayerChromium::ScrollbarLayerChromium(PassOwnPtr<WebKit::WebScrollbar> scrollbar, WebKit::WebScrollbarThemePainter painter, PassOwnPtr<WebKit::WebScrollbarThemeGeometry> geometry, int scrollLayerId)
     : m_scrollbar(scrollbar)
     , m_painter(painter)
     , m_geometry(geometry)
     , m_scrollLayerId(scrollLayerId)
     , m_textureFormat(GraphicsContext3D::INVALID_ENUM)
 {
 }
 
+ScrollbarLayerChromium::~ScrollbarLayerChromium()
+{
+}
+
 void ScrollbarLayerChromium::pushPropertiesTo(CCLayerImpl* layer)
 {
     LayerChromium::pushPropertiesTo(layer);
 
     CCScrollbarLayerImpl* scrollbarLayer = static_cast<CCScrollbarLayerImpl*>(layer);
 
     if (!scrollbarLayer->scrollbarGeometry())
         scrollbarLayer->setScrollbarGeometry(CCScrollbarGeometryFixedThumb::create(adoptPtr(m_geometry->clone())));
 
     scrollbarLayer->setScrollbarData(m_scrollbar.get());
 
     if (m_backTrack && m_backTrack->texture()->haveBackingTexture())
         scrollbarLayer->setBackTrackResourceId(m_backTrack->texture()->resourceId());
     else
         scrollbarLayer->setBackTrackResourceId(0);
 
     if (m_foreTrack && m_foreTrack->texture()->haveBackingTexture())
         scrollbarLayer->setForeTrackResourceId(m_foreTrack->texture()->resourceId());
     else
         scrollbarLayer->setForeTrackResourceId(0);
 
     if (m_thumb && m_thumb->texture()->haveBackingTexture())
         scrollbarLayer->setThumbResourceId(m_thumb->texture()->resourceId());
     else
         scrollbarLayer->setThumbResourceId(0);
 }
 
+ScrollbarLayerChromium* ScrollbarLayerChromium::toScrollbarLayerChromium()
+{
+    return this;
+}
+
 class ScrollbarBackgroundPainter : public LayerPainterChromium {
     WTF_MAKE_NONCOPYABLE(ScrollbarBackgroundPainter);
 public:
     static PassOwnPtr<ScrollbarBackgroundPainter> create(WebKit::WebScrollbar* scrollbar, WebKit::WebScrollbarThemePainter painter, WebKit::WebScrollbarThemeGeometry* geometry, WebKit::WebScrollbar::ScrollbarPart trackPart)
     {
         return adoptPtr(new ScrollbarBackgroundPainter(scrollbar, painter, geometry, trackPart));
     }
 
     virtual void paint(SkCanvas* skCanvas, const IntRect& contentRect, FloatRect&) OVERRIDE
     {
@@ skipping 174 matching lines @@
 
     // Consider the thumb to be at the origin when painting.
     WebKit::WebRect thumbRect = m_geometry->thumbRect(m_scrollbar.get());
     IntRect originThumbRect = IntRect(0, 0, thumbRect.width, thumbRect.height);
     if (!originThumbRect.isEmpty())
         updatePart(m_thumbUpdater.get(), m_thumb.get(), originThumbRect, queue, stats);
 }
 
 }
 #endif // USE(ACCELERATED_COMPOSITING)