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

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

Index: third_party/WebKit/Source/platform/graphics/paint/CullRect.cpp
diff --git a/third_party/WebKit/Source/core/paint/PaintInfo.cpp b/third_party/WebKit/Source/platform/graphics/paint/CullRect.cpp
similarity index 67%
copy from third_party/WebKit/Source/core/paint/PaintInfo.cpp
copy to third_party/WebKit/Source/platform/graphics/paint/CullRect.cpp
index b930437394c1838896126960ea21f7e1f2361083..0ad4b18a9d781f3e8b5273125b521a2084ae1ddb 100644
--- a/third_party/WebKit/Source/core/paint/PaintInfo.cpp
+++ b/third_party/WebKit/Source/platform/graphics/paint/CullRect.cpp
@@ -3,31 +3,23 @@
 // found in the LICENSE file.
 
 #include "config.h"
-#include "core/paint/PaintInfo.h"
+#include "platform/graphics/paint/CullRect.h"
 
-namespace blink {
-
-void PaintInfo::updatePaintingRootForChildren(const LayoutObject* layoutObject)
-{
-    if (!paintingRoot)
-        return;
+#include "platform/geometry/FloatRect.h"
+#include "platform/geometry/LayoutRect.h"
 
-    // If we're the painting root, kids draw normally, and see root of nullptr.
-    if (paintingRoot == layoutObject) {
-        paintingRoot = nullptr;
-        return;
-    }
-}
+namespace blink {
 
-bool PaintInfo::shouldPaintWithinRoot(const LayoutObject* layoutObject) const
+CullRect::CullRect(const CullRect& cullRect, const IntPoint& offset)
 {
-    return !paintingRoot || paintingRoot == layoutObject;
+    m_rect = cullRect.m_rect;
+    m_rect.moveBy(offset);
 }
 
-CullRect::CullRect(const CullRect& cullRect, const IntPoint& offset)
+CullRect::CullRect(const CullRect& cullRect, const IntSize& offset)
 {
     m_rect = cullRect.m_rect;
-    m_rect.moveBy(offset);
+    m_rect.move(offset);
 }
 
 bool CullRect::intersectsCullRect(const IntRect& boundingBox) const
@@ -55,11 +47,6 @@ 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())