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

Source/core/html/canvas/WebGLFramebuffer.h

 /*
  * Copyright (C) 2009 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 21 matching lines @@
 #include "wtf/PassRefPtr.h"
 #include "wtf/RefCounted.h"
 
 namespace blink {
 
 class WebGLRenderbuffer;
 class WebGLTexture;
 
 class WebGLFramebuffer FINAL : public WebGLContextObject, public ScriptWrappable {
 public:
-    class WebGLAttachment : public RefCounted<WebGLAttachment> {
+    class WebGLAttachment : public RefCountedWillBeGarbageCollectedFinalized<WebGLAttachment> {
     public:
         virtual ~WebGLAttachment();
 
         virtual GLsizei width() const = 0;
         virtual GLsizei height() const = 0;
         virtual GLenum format() const = 0;
         // For texture attachment, type() returns the type of the attached texture.
         // For renderbuffer attachment, the type of the renderbuffer may vary with GL implementation.
         // To avoid confusion, it would be better to not implement type() for renderbuffer attachment and
         // we should always use the internalformat of the renderbuffer and avoid using type() API.
         virtual GLenum type() const = 0;
         virtual WebGLSharedObject* object() const = 0;
         virtual bool isSharedObject(WebGLSharedObject*) const = 0;
         virtual bool valid() const = 0;
         virtual void onDetached(blink::WebGraphicsContext3D*) = 0;
         virtual void attach(blink::WebGraphicsContext3D*, GLenum attachment) = 0;
         virtual void unattach(blink::WebGraphicsContext3D*, GLenum attachment) = 0;
 
+        virtual void trace(Visitor*) { }
+
     protected:
         WebGLAttachment();
     };
 
     virtual ~WebGLFramebuffer();
 
-    static PassRefPtr<WebGLFramebuffer> create(WebGLRenderingContextBase*);
+    static PassRefPtrWillBeRawPtr<WebGLFramebuffer> create(WebGLRenderingContextBase*);
 
     void setAttachmentForBoundFramebuffer(GLenum attachment, GLenum texTarget, WebGLTexture*, GLint level);
     void setAttachmentForBoundFramebuffer(GLenum attachment, WebGLRenderbuffer*);
     // If an object is attached to the currently bound framebuffer, remove it.
     void removeAttachmentFromBoundFramebuffer(WebGLSharedObject*);
     // If a given attachment point for the currently bound framebuffer is not null, remove the attached object.
     void removeAttachmentFromBoundFramebuffer(GLenum);
     WebGLSharedObject* getAttachmentObject(GLenum) const;
 
     GLenum colorBufferFormat() const;
@@ skipping 14 matching lines @@
 
     void setHasEverBeenBound() { m_hasEverBeenBound = true; }
 
     bool hasStencilBuffer() const;
 
     // Wrapper for drawBuffersEXT/drawBuffersARB to work around a driver bug.
     void drawBuffers(const Vector<GLenum>& bufs);
 
     GLenum getDrawBuffer(GLenum);
 
+    virtual void trace(Visitor*) OVERRIDE;
+
 protected:
-    WebGLFramebuffer(WebGLRenderingContextBase*);
+    explicit WebGLFramebuffer(WebGLRenderingContextBase*);
 
     virtual void deleteObjectImpl(blink::WebGraphicsContext3D*, Platform3DObject) OVERRIDE;
 
 private:
     WebGLAttachment* getAttachment(GLenum) const;
     bool isAttachmentComplete(WebGLAttachment* attachedObject, GLenum attachment, const char** reason) const;
 
     // Check if the framebuffer is currently bound.
     bool isBound() const;
 
     // attach 'attachment' at 'attachmentPoint'.
     void attach(GLenum attachment, GLenum attachmentPoint);
 
     // Check if a new drawBuffers call should be issued. This is called when we add or remove an attachment.
     void drawBuffersIfNecessary(bool force);
 
-    typedef WTF::HashMap<GLenum, RefPtr<WebGLAttachment> > AttachmentMap;
+    typedef WillBeHeapHashMap<GLenum, RefPtrWillBeMember<WebGLAttachment> > AttachmentMap;
 
     AttachmentMap m_attachments;
 
     bool m_hasEverBeenBound;
 
     Vector<GLenum> m_drawBuffers;
     Vector<GLenum> m_filteredDrawBuffers;
 };
 
 } // namespace blink
 
 #endif // WebGLFramebuffer_h