[Oilpan] Migrate classes under module/webgl onto oilpan heap

Source/modules/webgl/WebGL2RenderingContext.h

Index: Source/modules/webgl/WebGL2RenderingContext.h
diff --git a/Source/modules/webgl/WebGL2RenderingContext.h b/Source/modules/webgl/WebGL2RenderingContext.h
index c92160fa2c254fa08a0543b059a44c28c5a10dd0..826e39204645f5917363bdbc6829288a80ebe1d2 100644
--- a/Source/modules/webgl/WebGL2RenderingContext.h
+++ b/Source/modules/webgl/WebGL2RenderingContext.h
@@ -38,16 +38,16 @@ public:
 protected:
     WebGL2RenderingContext(HTMLCanvasElement* passedCanvas, PassOwnPtr<WebGraphicsContext3D>, const WebGLContextAttributes& requestedAttributes);
 
-    RefPtrWillBeMember<CHROMIUMSubscribeUniform> m_chromiumSubscribeUniform;
-    RefPtrWillBeMember<EXTTextureFilterAnisotropic> m_extTextureFilterAnisotropic;
-    RefPtrWillBeMember<OESTextureFloatLinear> m_oesTextureFloatLinear;
-    RefPtrWillBeMember<WebGLCompressedTextureATC> m_webglCompressedTextureATC;
-    RefPtrWillBeMember<WebGLCompressedTextureETC1> m_webglCompressedTextureETC1;
-    RefPtrWillBeMember<WebGLCompressedTexturePVRTC> m_webglCompressedTexturePVRTC;
-    RefPtrWillBeMember<WebGLCompressedTextureS3TC> m_webglCompressedTextureS3TC;
-    RefPtrWillBeMember<WebGLDebugRendererInfo> m_webglDebugRendererInfo;
-    RefPtrWillBeMember<WebGLDebugShaders> m_webglDebugShaders;
-    RefPtrWillBeMember<WebGLLoseContext> m_webglLoseContext;
+    PersistentWillBeMember<CHROMIUMSubscribeUniform> m_chromiumSubscribeUniform;
+    PersistentWillBeMember<EXTTextureFilterAnisotropic> m_extTextureFilterAnisotropic;
+    PersistentWillBeMember<OESTextureFloatLinear> m_oesTextureFloatLinear;
+    PersistentWillBeMember<WebGLCompressedTextureATC> m_webglCompressedTextureATC;
+    PersistentWillBeMember<WebGLCompressedTextureETC1> m_webglCompressedTextureETC1;
+    PersistentWillBeMember<WebGLCompressedTexturePVRTC> m_webglCompressedTexturePVRTC;
+    PersistentWillBeMember<WebGLCompressedTextureS3TC> m_webglCompressedTextureS3TC;
+    PersistentWillBeMember<WebGLDebugRendererInfo> m_webglDebugRendererInfo;
+    PersistentWillBeMember<WebGLDebugShaders> m_webglDebugShaders;
+    PersistentWillBeMember<WebGLLoseContext> m_webglLoseContext;

[haraken, 2015/08/04 00:06:52]

These persistent handles can be removed if you move CanvasRenderingContext to
the oilpan heap at the same time. Is there any reason that makes it hard to move
CanvasRenderingContext to the oilpan heap?

Either way, I think we can keep the current CL (already huge) as is and move
CanvasRenderingContext in a follow-up CL.

[Ken Russell (switch to Gerrit), 2015/08/04 00:34:10]

Understanding that this is the reason for the persistent handles, let's
definitely leave these as persistent handles rather than weak members. Moving
CanvasRenderingContext into the Oilpan heap at the same time as the
WebGLRenderingContext sounds like too much to do in a single CL. I'm sure junov@
will agree.

[peria, 2015/08/04 09:10:25]

Acknowledged.
http://crbug.com/516607

 };
 
 DEFINE_TYPE_CASTS(WebGL2RenderingContext, CanvasRenderingContext, context,