[Slimming Paint] Blink-side contiguous allocation of display items.

Source/platform/graphics/paint/ClipPathDisplayItem.h

Index: Source/platform/graphics/paint/ClipPathDisplayItem.h
diff --git a/Source/platform/graphics/paint/ClipPathDisplayItem.h b/Source/platform/graphics/paint/ClipPathDisplayItem.h
index 23238873bad2711d33a550c99e3b3c282511c4d5..5bac5d27d3767bee0e7b949d5e6eabe043f356a4 100644
--- a/Source/platform/graphics/paint/ClipPathDisplayItem.h
+++ b/Source/platform/graphics/paint/ClipPathDisplayItem.h
@@ -21,12 +21,15 @@ public:
         return adoptPtr(new BeginClipPathDisplayItem(client, clipPath));
     }
 
-    BeginClipPathDisplayItem(const DisplayItemClientWrapper& client, const Path& clipPath)
+    BeginClipPathDisplayItem(const DisplayItemClientWrapper& client, const SkPath& clipPath)
         : PairedBeginDisplayItem(client, BeginClipPath)
-        , m_clipPath(clipPath.skPath()) { }
+        , m_clipPath(clipPath) { }
+    BeginClipPathDisplayItem(const DisplayItemClientWrapper& client, const Path& clipPath)
+        : BeginClipPathDisplayItem(client, clipPath.skPath()) { }
 
     virtual void replay(GraphicsContext&) override;
     virtual void appendToWebDisplayItemList(WebDisplayItemList*) const override;
+    virtual void appendByMoving(DisplayItems&) override;
 
 private:
     const SkPath m_clipPath;
@@ -48,6 +51,7 @@ public:
 
     virtual void replay(GraphicsContext&) override;
     virtual void appendToWebDisplayItemList(WebDisplayItemList*) const override;
+    virtual void appendByMoving(DisplayItems&) override;
 
 private:
 #if ENABLE(ASSERT)