Moved the majority of WebGL functionality into WebGLRenderingContextBase

Source/core/html/canvas/WebGLShader.h

Index: Source/core/html/canvas/WebGLShader.h
diff --git a/Source/core/html/canvas/WebGLShader.h b/Source/core/html/canvas/WebGLShader.h
index e5864a7897bb028ce056ebf3fc731158cc21fe14..55a9fe0be881d27bfe4ddaa0c019e429e70faaed 100644
--- a/Source/core/html/canvas/WebGLShader.h
+++ b/Source/core/html/canvas/WebGLShader.h
@@ -36,7 +36,7 @@ class WebGLShader : public WebGLSharedObject, public ScriptWrappable {
 public:
     virtual ~WebGLShader();
 
-    static PassRefPtr<WebGLShader> create(WebGLRenderingContext*, GC3Denum);
+    static PassRefPtr<WebGLShader> create(WebGLRenderingContextBase*, GC3Denum);
 
     GC3Denum getType() const { return m_type; }
     const String& getSource() const { return m_source; }
@@ -44,7 +44,7 @@ public:
     void setSource(const String& source) { m_source = source; }
 
 private:
-    WebGLShader(WebGLRenderingContext*, GC3Denum);
+    WebGLShader(WebGLRenderingContextBase*, GC3Denum);
 
     virtual void deleteObjectImpl(GraphicsContext3D*, Platform3DObject);