Preliminary paint property walk implementation for SPv2

third_party/WebKit/Source/core/frame/FrameView.h

Index: third_party/WebKit/Source/core/frame/FrameView.h
diff --git a/third_party/WebKit/Source/core/frame/FrameView.h b/third_party/WebKit/Source/core/frame/FrameView.h
index f2a4129d0bd3ac00f9d88dfd600842707126f8d1..3b763f88f7fd692a06be49c60e527c3773644ab4 100644
--- a/third_party/WebKit/Source/core/frame/FrameView.h
+++ b/third_party/WebKit/Source/core/frame/FrameView.h
@@ -36,6 +36,7 @@
 #include "platform/geometry/IntRect.h"
 #include "platform/geometry/LayoutRect.h"
 #include "platform/graphics/Color.h"
+#include "platform/graphics/paint/TransformPaintPropertyNode.h"
 #include "platform/scroll/ScrollTypes.h"
 #include "platform/scroll/ScrollableArea.h"
 #include "platform/scroll/Scrollbar.h"
@@ -556,6 +557,13 @@ public:
     void setFrameTimingRequestsDirty(bool isDirty) { m_frameTimingRequestsDirty = isDirty; }
     bool frameTimingRequestsDirty() { return m_frameTimingRequestsDirty; }
 
+    // Paint properties for SPv2 Only.
+    void setPreTranslation(PassRefPtr<TransformPaintPropertyNode> preTranslation) { m_preTranslation = preTranslation; }
+    const TransformPaintPropertyNode* preTranslation() const { return m_preTranslation.get(); }
+
+    void setScrollTranslation(PassRefPtr<TransformPaintPropertyNode> scrollTranslation) { m_scrollTranslation = scrollTranslation; }
+    const TransformPaintPropertyNode* scrollTranslation() const { return m_scrollTranslation.get(); }
+
 protected:
     // Scroll the content via the compositor.
     bool scrollContentsFastPath(const IntSize& scrollDelta);
@@ -832,6 +840,13 @@ private:
     // TODO(bokan): crbug.com/484188. We should specialize FrameView for the
     // main frame.
     OwnPtrWillBeMember<ScrollableArea> m_viewportScrollableArea;
+
+    // Paint properties for SPv2 Only.
+    // The hierarchy of transform subtree created by a FrameView.
+    // [ preTranslation ]               The offset from Widget::frameRect. Establishes viewport.
+    //     +---[ scrollTranslation ]    Frame scrolling. This is going away in favor of Settings::rootLayerScrolls.
+    RefPtr<TransformPaintPropertyNode> m_preTranslation;
+    RefPtr<TransformPaintPropertyNode> m_scrollTranslation;
 };
 
 inline void FrameView::incrementVisuallyNonEmptyCharacterCount(unsigned count)