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 70aeab731d7e084d5f7d6ef42c11ec5d2dc2ba77..0844321389b1a124fffc35762ea2e80de59edf02 100644
--- a/Source/core/html/canvas/WebGLObject.h
+++ b/Source/core/html/canvas/WebGLObject.h
@@ -34,7 +34,7 @@ namespace WebCore {
 
 class GraphicsContext3D;
 class WebGLContextGroup;
-class WebGLRenderingContext;
+class WebGLRenderingContextBase;
 
 class WebGLObject : public RefCounted<WebGLObject> {
 public:
@@ -56,10 +56,10 @@ 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);