Moved the majority of WebGL functionality into WebGLRenderingContextBase

Source/core/html/canvas/WebGLObject.h

Index: Source/core/html/canvas/WebGLObject.h
diff --git a/Source/core/html/canvas/WebGLObject.h b/Source/core/html/canvas/WebGLObject.h
index 159ef68f8c3e9e6791b789456f53d13bde1c1521..ae5c439c8a6be5f9d8a5ff3f930100daa3508a78 100644
--- a/Source/core/html/canvas/WebGLObject.h
+++ b/Source/core/html/canvas/WebGLObject.h
@@ -36,7 +36,7 @@ class WebGraphicsContext3D;
 namespace WebCore {
 
 class WebGLContextGroup;
-class WebGLRenderingContext;
+class WebGLRenderingContextBase;
 
 class WebGLObject : public RefCounted<WebGLObject> {
 public:
@@ -58,10 +58,10 @@ public:
     bool isDeleted() { return m_deleted; }
 
     // True if this object belongs to the group or context.
-    virtual bool validate(const WebGLContextGroup*, const WebGLRenderingContext*) const = 0;
+    virtual bool validate(const WebGLContextGroup*, const WebGLRenderingContextBase*) const = 0;
 
 protected:
-    WebGLObject(WebGLRenderingContext*);
+    WebGLObject(WebGLRenderingContextBase*);
 
     // setObject should be only called once right after creating a WebGLObject.
     void setObject(Platform3DObject);