Move paint code for RenderScrollbar and RenderScrollbarPart into ScrollbarPainter.

Source/core/frame/FrameView.cpp

 /*
  * Copyright (C) 1998, 1999 Torben Weis <weis@kde.org>
  *                     1999 Lars Knoll <knoll@kde.org>
  *                     1999 Antti Koivisto <koivisto@kde.org>
  *                     2000 Dirk Mueller <mueller@kde.org>
  * Copyright (C) 2004, 2005, 2006, 2007, 2008 Apple Inc. All rights reserved.
  *           (C) 2006 Graham Dennis (graham.dennis@gmail.com)
  *           (C) 2006 Alexey Proskuryakov (ap@nypop.com)
  * Copyright (C) 2009 Google Inc. All rights reserved.
  *
@@ skipping 37 matching lines @@
 #include "core/inspector/InspectorTraceEvents.h"
 #include "core/loader/FrameLoader.h"
 #include "core/loader/FrameLoaderClient.h"
 #include "core/page/Chrome.h"
 #include "core/page/ChromeClient.h"
 #include "core/page/EventHandler.h"
 #include "core/page/FocusController.h"
 #include "core/page/FrameTree.h"
 #include "core/page/Page.h"
 #include "core/page/scrolling/ScrollingCoordinator.h"
+#include "core/paint/ScrollbarPainter.h"
 #include "core/rendering/RenderCounter.h"
 #include "core/rendering/RenderEmbeddedObject.h"
 #include "core/rendering/RenderLayer.h"
 #include "core/rendering/RenderListBox.h"
 #include "core/rendering/RenderPart.h"
 #include "core/rendering/RenderScrollbar.h"
 #include "core/rendering/RenderScrollbarPart.h"
 #include "core/rendering/RenderTheme.h"
 #include "core/rendering/RenderView.h"
 #include "core/rendering/RenderWidget.h"
@@ skipping 2223 matching lines @@
 
     ScrollView::updateScrollCorner();
 }
 
 void FrameView::paintScrollCorner(GraphicsContext* context, const IntRect& cornerRect)
 {
     if (m_scrollCorner) {
         bool needsBackgorund = m_frame->isMainFrame();
         if (needsBackgorund)
             context->fillRect(cornerRect, baseBackgroundColor());
-        m_scrollCorner->paintIntoRect(context, cornerRect.location(), cornerRect);
+        ScrollbarPainter::paintIntoRect(m_scrollCorner, context, cornerRect.location(), cornerRect);
         return;
     }
 
     ScrollView::paintScrollCorner(context, cornerRect);
 }
 
 void FrameView::paintScrollbar(GraphicsContext* context, Scrollbar* bar, const IntRect& rect)
 {
     bool needsBackgorund = bar->isCustomScrollbar() && m_frame->isMainFrame();
     if (needsBackgorund) {
@@ skipping 707 matching lines @@
     IntSize visibleSize = expandedIntSize(visibleContentSizeF);
 
     IntPoint maximumOffset(
         contentsWidth() - visibleSize.width() - scrollOrigin().x(),
         contentsHeight() - visibleSize.height() - scrollOrigin().y());
     maximumOffset.clampNegativeToZero();
     return maximumOffset;
 }
 
 } // namespace blink