Oilpan: move 2D Canvas and WebGL objects to the heap.

Source/core/html/canvas/Path2D.h

Index: Source/core/html/canvas/Path2D.h
diff --git a/Source/core/html/canvas/Path2D.h b/Source/core/html/canvas/Path2D.h
index 193657006840390408120426534706e1606fe6eb..49b2bec163f2b70bb72c08a953f9d12412063c80 100644
--- a/Source/core/html/canvas/Path2D.h
+++ b/Source/core/html/canvas/Path2D.h
@@ -32,20 +32,21 @@
 #include "core/html/canvas/CanvasPathMethods.h"
 #include "core/svg/SVGMatrixTearOff.h"
 #include "core/svg/SVGPathUtilities.h"
+#include "platform/heap/Handle.h"
 #include "platform/transforms/AffineTransform.h"
 #include "wtf/PassRefPtr.h"
 #include "wtf/RefCounted.h"
 
 namespace blink {
 
-class Path2D FINAL : public RefCounted<Path2D>, public CanvasPathMethods, public ScriptWrappable {
-    WTF_MAKE_NONCOPYABLE(Path2D); WTF_MAKE_FAST_ALLOCATED;
+class Path2D FINAL : public RefCountedWillBeGarbageCollectedFinalized<Path2D>, public CanvasPathMethods, public ScriptWrappable {
+    WTF_MAKE_NONCOPYABLE(Path2D); WTF_MAKE_FAST_ALLOCATED_WILL_BE_REMOVED;
 public:
-    static PassRefPtr<Path2D> create() { return adoptRef(new Path2D); }
-    static PassRefPtr<Path2D> create(const String& pathData) { return adoptRef(new Path2D(pathData)); }
-    static PassRefPtr<Path2D> create(Path2D* path) { return adoptRef(new Path2D(path)); }
+    static PassRefPtrWillBeRawPtr<Path2D> create() { return adoptRefWillBeNoop(new Path2D); }
+    static PassRefPtrWillBeRawPtr<Path2D> create(const String& pathData) { return adoptRefWillBeNoop(new Path2D(pathData)); }
+    static PassRefPtrWillBeRawPtr<Path2D> create(Path2D* path) { return adoptRefWillBeNoop(new Path2D(path)); }
 
-    static PassRefPtr<Path2D> create(const Path& path) { return adoptRef(new Path2D(path)); }
+    static PassRefPtrWillBeRawPtr<Path2D> create(const Path& path) { return adoptRefWillBeNoop(new Path2D(path)); }
 
     const Path& path() const { return m_path; }
 
@@ -59,7 +60,10 @@ public:
         Path src = path->path();
         m_path.addPath(src, transform ? transform->value() : AffineTransform(1, 0, 0, 1, 0, 0));
     }
+
     virtual ~Path2D() { }
+    void trace(Visitor*) { }
+
 private:
     Path2D() : CanvasPathMethods()
     {