Move painting code from FrameView to FramePainter.

Source/core/paint/FramePainter.h

+// Copyright 2014 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 FramePainter_h
+#define FramePainter_h
+
+namespace blink {
+
+class FrameView;
+class GraphicsContext;
+class IntRect;
+class Scrollbar;
+
+class FramePainter {
+public:
+    FramePainter(FrameView& frameView) : m_frameView(frameView) { }
+
+    void paint(GraphicsContext*, const IntRect&);
+    void paintScrollbars(GraphicsContext*, const IntRect&);
+    void paintContents(GraphicsContext*, const IntRect& damageRect);
+    void paintScrollCorner(GraphicsContext*, const IntRect& cornerRect);
+
+private:
+    void paintScrollbar(GraphicsContext*, Scrollbar*, const IntRect&);
+    void paintOverhangAreas(GraphicsContext*, const IntRect& horizontalOverhangArea, const IntRect& verticalOverhangArea, const IntRect& dirtyRect);
+    void calculateAndPaintOverhangAreas(GraphicsContext*, const IntRect& dirtyRect);
+    void paintOverhangAreasInternal(GraphicsContext*, const IntRect& horizontalOverhangArea, const IntRect& verticalOverhangArea, const IntRect& dirtyRect);
+
+    FrameView& m_frameView;
+    static bool s_inPaintContents;
+};
+
+} // namespace blink
+
+#endif // FramePainter_h