Slimming Paint phase 2 compositing algorithm plumbing

Source/platform/graphics/GraphicsLayer.h

Index: Source/platform/graphics/GraphicsLayer.h
diff --git a/Source/platform/graphics/GraphicsLayer.h b/Source/platform/graphics/GraphicsLayer.h
index 5ad5db9706a847601c25880ddd83522a626ea1a0..4e73cb6ecc44aa3c70fbbde9c5f2575e01314597 100644
--- a/Source/platform/graphics/GraphicsLayer.h
+++ b/Source/platform/graphics/GraphicsLayer.h
@@ -39,6 +39,7 @@
 #include "platform/graphics/PaintInvalidationReason.h"
 #include "platform/graphics/filters/FilterOperations.h"
 #include "platform/graphics/paint/DisplayItemClient.h"
+#include "platform/graphics/paint/DisplayItemTransformTree.h"
 #include "platform/transforms/TransformationMatrix.h"
 #include "public/platform/WebCompositorAnimationDelegate.h"
 #include "public/platform/WebContentLayer.h"
@@ -248,6 +249,9 @@ public:
 
     DisplayItemList* displayItemList() override;
 
+    void setTransformTree(PassOwnPtr<const DisplayItemTransformTree> transformTree) { m_transformTree = transformTree; }

[chrishtr, 2015/08/13 17:28:32]

Revert changes to this class, per earlier comments.

[pdr., 2015/08/13 20:55:00]

These changes are needed for test coverage until we find a new home for the new
transform tree. I've added a comment that these will be moved.

+    const DisplayItemTransformTree* transformTree() const { return m_transformTree.get(); }
+
     // Exposed for tests.
     virtual WebLayer* contentsLayer() const { return m_contentsLayer; }
 
@@ -357,6 +361,8 @@ private:
     int m_3dRenderingContext;
 
     OwnPtr<DisplayItemList> m_displayItemList;
+
+    OwnPtr<const DisplayItemTransformTree> m_transformTree;
 };
 
 } // namespace blink