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

Source/core/html/canvas/WebGLRenderingContext.h

Index: Source/core/html/canvas/WebGLRenderingContext.h
diff --git a/Source/core/html/canvas/WebGLRenderingContext.h b/Source/core/html/canvas/WebGLRenderingContext.h
index ab5d1369344cb17a9c1ce96dd50e349c951d2057..404076f731f8865973a04f868af870c9be027276 100644
--- a/Source/core/html/canvas/WebGLRenderingContext.h
+++ b/Source/core/html/canvas/WebGLRenderingContext.h
@@ -40,31 +40,33 @@ public:
     virtual String contextName() const OVERRIDE { return "WebGLRenderingContext"; }
     virtual void registerContextExtensions() OVERRIDE;
 
+    virtual void trace(Visitor*) OVERRIDE;
+
 private:
     WebGLRenderingContext(HTMLCanvasElement*, PassOwnPtr<blink::WebGraphicsContext3D>, WebGLContextAttributes*);
 
     // Enabled extension objects.
-    RefPtr<ANGLEInstancedArrays> m_angleInstancedArrays;
-    RefPtr<EXTBlendMinMax> m_extBlendMinMax;
-    RefPtr<EXTFragDepth> m_extFragDepth;
-    RefPtr<EXTShaderTextureLOD> m_extShaderTextureLOD;
-    RefPtr<EXTTextureFilterAnisotropic> m_extTextureFilterAnisotropic;
-    RefPtr<OESTextureFloat> m_oesTextureFloat;
-    RefPtr<OESTextureFloatLinear> m_oesTextureFloatLinear;
-    RefPtr<OESTextureHalfFloat> m_oesTextureHalfFloat;
-    RefPtr<OESTextureHalfFloatLinear> m_oesTextureHalfFloatLinear;
-    RefPtr<OESStandardDerivatives> m_oesStandardDerivatives;
-    RefPtr<OESVertexArrayObject> m_oesVertexArrayObject;
-    RefPtr<OESElementIndexUint> m_oesElementIndexUint;
-    RefPtr<WebGLLoseContext> m_webglLoseContext;
-    RefPtr<WebGLDebugRendererInfo> m_webglDebugRendererInfo;
-    RefPtr<WebGLDebugShaders> m_webglDebugShaders;
-    RefPtr<WebGLDrawBuffers> m_webglDrawBuffers;
-    RefPtr<WebGLCompressedTextureATC> m_webglCompressedTextureATC;
-    RefPtr<WebGLCompressedTextureETC1> m_webglCompressedTextureETC1;
-    RefPtr<WebGLCompressedTexturePVRTC> m_webglCompressedTexturePVRTC;
-    RefPtr<WebGLCompressedTextureS3TC> m_webglCompressedTextureS3TC;
-    RefPtr<WebGLDepthTexture> m_webglDepthTexture;
+    RefPtrWillBeMember<ANGLEInstancedArrays> m_angleInstancedArrays;
+    RefPtrWillBeMember<EXTBlendMinMax> m_extBlendMinMax;
+    RefPtrWillBeMember<EXTFragDepth> m_extFragDepth;
+    RefPtrWillBeMember<EXTShaderTextureLOD> m_extShaderTextureLOD;
+    RefPtrWillBeMember<EXTTextureFilterAnisotropic> m_extTextureFilterAnisotropic;
+    RefPtrWillBeMember<OESTextureFloat> m_oesTextureFloat;
+    RefPtrWillBeMember<OESTextureFloatLinear> m_oesTextureFloatLinear;
+    RefPtrWillBeMember<OESTextureHalfFloat> m_oesTextureHalfFloat;
+    RefPtrWillBeMember<OESTextureHalfFloatLinear> m_oesTextureHalfFloatLinear;
+    RefPtrWillBeMember<OESStandardDerivatives> m_oesStandardDerivatives;
+    RefPtrWillBeMember<OESVertexArrayObject> m_oesVertexArrayObject;
+    RefPtrWillBeMember<OESElementIndexUint> m_oesElementIndexUint;
+    RefPtrWillBeMember<WebGLLoseContext> m_webglLoseContext;
+    RefPtrWillBeMember<WebGLDebugRendererInfo> m_webglDebugRendererInfo;
+    RefPtrWillBeMember<WebGLDebugShaders> m_webglDebugShaders;
+    RefPtrWillBeMember<WebGLDrawBuffers> m_webglDrawBuffers;
+    RefPtrWillBeMember<WebGLCompressedTextureATC> m_webglCompressedTextureATC;
+    RefPtrWillBeMember<WebGLCompressedTextureETC1> m_webglCompressedTextureETC1;
+    RefPtrWillBeMember<WebGLCompressedTexturePVRTC> m_webglCompressedTexturePVRTC;
+    RefPtrWillBeMember<WebGLCompressedTextureS3TC> m_webglCompressedTextureS3TC;
+    RefPtrWillBeMember<WebGLDepthTexture> m_webglDepthTexture;
 };
 
 DEFINE_TYPE_CASTS(WebGLRenderingContext, CanvasRenderingContext, context,