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

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

Index: third_party/WebKit/Source/platform/graphics/paint/CullRect.h
diff --git a/third_party/WebKit/Source/platform/graphics/paint/CullRect.h b/third_party/WebKit/Source/platform/graphics/paint/CullRect.h
new file mode 100644
index 0000000000000000000000000000000000000000..3173b664c1bfc3cbf66dcd12735ab9dffa672fde
--- /dev/null
+++ b/third_party/WebKit/Source/platform/graphics/paint/CullRect.h
@@ -0,0 +1,60 @@
+// Copyright 2015 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 CullRect_h

[wkorman, 2015/10/28 22:43:29]

+1 blank above

[chrishtr, 2015/10/28 23:10:25]

Done.

+#define CullRect_h
+
+// TODO(jchaffraix): Once we unify PaintBehavior and PaintLayerFlags, we should move

[wkorman, 2015/10/28 22:43:29]

is this still relevant here?

[chrishtr, 2015/10/28 23:10:25]

Removed.

+// PaintLayerFlags to PaintPhase and rename it. Thus removing the need for this #include.
+
+#include "platform/geometry/IntRect.h"
+#include "platform/transforms/AffineTransform.h"
+#include "wtf/Allocator.h"
+#include "wtf/HashMap.h"
+#include "wtf/ListHashSet.h"
+
+#include <limits>
+
+namespace blink {
+
+class FloatRect;
+class LayoutBoxModelObject;
+class LayoutInline;
+class LayoutObject;
+class LayoutRect;
+class LayoutUnit;
+class PaintInvalidationState;
+
+class PLATFORM_EXPORT CullRect {
+public:
+    explicit CullRect(const IntRect& rect) : m_rect(rect) { }
+    CullRect(const CullRect&, const IntPoint& offset);
+    CullRect(const CullRect&, const IntSize& offset);
+
+    bool intersectsCullRect(const AffineTransform&, const FloatRect& boundingBox) const;
+    void updateCullRect(const AffineTransform& localToParentTransform);
+    bool intersectsCullRect(const IntRect&) const;
+    bool intersectsCullRect(const LayoutRect&) const;
+    bool intersectsHorizontalRange(LayoutUnit lo, LayoutUnit hi) const;
+    bool intersectsVerticalRange(LayoutUnit lo, LayoutUnit hi) const;
+
+private:
+    IntRect m_rect;
+
+    // TODO(chrishtr): temporary while we implement CullRect everywhere.
+    friend class FramePainter;
+    friend class GridPainter;
+    friend class SVGInlineTextBoxPainter;
+    friend class ScrollbarThemeMacNonOverlayAPI;
+    friend class ReplicaPainter;
+    friend class SVGPaintContext;
+    friend class SVGRootInlineBoxPainter;
+    friend class SVGShapePainter;
+    friend class TableSectionPainter;
+    friend class ThemePainterMac;
+    friend class WebPluginContainerImpl;
+};
+
+} // namespace blink
+
+#endif // CullRect_h