Change Widget subclasses to use a CullRect instead of an IntRect for painting.

third_party/WebKit/Source/platform/graphics/paint/CullRect.cpp

 // 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.
 
 #include "config.h"
-#include "core/paint/PaintInfo.h"
+#include "platform/graphics/paint/CullRect.h"
+
+#include "platform/geometry/FloatRect.h"
+#include "platform/geometry/LayoutRect.h"
 
 namespace blink {
 
-void PaintInfo::updatePaintingRootForChildren(const LayoutObject* layoutObject)
-{
-    if (!paintingRoot)
-        return;
-
-    // If we're the painting root, kids draw normally, and see root of nullptr.
-    if (paintingRoot == layoutObject) {
-        paintingRoot = nullptr;
-        return;
-    }
-}
-
-bool PaintInfo::shouldPaintWithinRoot(const LayoutObject* layoutObject) const
-{
-    return !paintingRoot || paintingRoot == layoutObject;
-}
-
 CullRect::CullRect(const CullRect& cullRect, const IntPoint& offset)
 {
     m_rect = cullRect.m_rect;
     m_rect.moveBy(offset);
 }
 
+CullRect::CullRect(const CullRect& cullRect, const IntSize& offset)
+{
+    m_rect = cullRect.m_rect;
+    m_rect.move(offset);
+}
+
 bool CullRect::intersectsCullRect(const IntRect& boundingBox) const
 {
     return boundingBox.intersects(m_rect);
 }
 
 bool CullRect::intersectsCullRect(const AffineTransform& transform, const FloatRect& boundingBox) const
 {
     return transform.mapRect(boundingBox).intersects(m_rect);
 }
 
 bool CullRect::intersectsCullRect(const LayoutRect& rectArg) const
 {
     return m_rect.intersects(enclosingIntRect(rectArg));
 }
 
 bool CullRect::intersectsHorizontalRange(LayoutUnit lo, LayoutUnit hi) const
 {
     return !(lo >= m_rect.maxX() || hi <= m_rect.x());
 }
 
 bool CullRect::intersectsVerticalRange(LayoutUnit lo, LayoutUnit hi) const
 {
     return !(lo >= m_rect.maxY() || hi <= m_rect.y());
 }
 
-void PaintInfo::updateCullRect(const AffineTransform& localToParentTransform)
-{
-    m_cullRect.updateCullRect(localToParentTransform);
-}
-
 void CullRect::updateCullRect(const AffineTransform& localToParentTransform)
 {
     if (m_rect != LayoutRect::infiniteIntRect())
         m_rect = localToParentTransform.inverse().mapRect(m_rect);
 }
 
 } // namespace blink