Moved the majority of WebGL functionality into WebGLRenderingContextBase

Source/core/html/canvas/WebGLCompressedTextureATC.h

Index: Source/core/html/canvas/WebGLCompressedTextureATC.h
diff --git a/Source/core/html/canvas/WebGLCompressedTextureATC.h b/Source/core/html/canvas/WebGLCompressedTextureATC.h
index 500b31bc0f874d1ee9330ac8bb2a5d6b9cb7ed07..069fe145bd0e2d3ad8af17ca7bbbe04415297196 100644
--- a/Source/core/html/canvas/WebGLCompressedTextureATC.h
+++ b/Source/core/html/canvas/WebGLCompressedTextureATC.h
@@ -36,15 +36,15 @@ class WebGLTexture;
 
 class WebGLCompressedTextureATC FINAL : public WebGLExtension, public ScriptWrappable {
 public:
-    static PassRefPtr<WebGLCompressedTextureATC> create(WebGLRenderingContext*);
-    static bool supported(WebGLRenderingContext*);
+    static PassRefPtr<WebGLCompressedTextureATC> create(WebGLRenderingContextBase*);
+    static bool supported(WebGLRenderingContextBase*);
     static const char* extensionName();
 
     virtual ~WebGLCompressedTextureATC();
-    virtual ExtensionName name() const OVERRIDE;
+    virtual WebGLExtensionName name() const OVERRIDE;
 
 private:
-    WebGLCompressedTextureATC(WebGLRenderingContext*);
+    WebGLCompressedTextureATC(WebGLRenderingContextBase*);
 };
 
 } // namespace WebCore