Moved the majority of WebGL functionality into WebGLRenderingContextBase

Source/core/html/canvas/WebGLExtensionName.h

+// Copyright 2014 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef WebGLExtensionName_h
+#define WebGLExtensionName_h
+
+namespace WebCore {
+
+// Extension names are needed to properly wrap instances in JavaScript objects.
+enum WebGLExtensionName {
+    ANGLEInstancedArraysName,
+    EXTFragDepthName,
+    EXTTextureFilterAnisotropicName,
+    OESElementIndexUintName,
+    OESStandardDerivativesName,
+    OESTextureFloatLinearName,
+    OESTextureFloatName,
+    OESTextureHalfFloatLinearName,
+    OESTextureHalfFloatName,
+    OESVertexArrayObjectName,
+    WebGLCompressedTextureATCName,
+    WebGLCompressedTexturePVRTCName,
+    WebGLCompressedTextureS3TCName,
+    WebGLDebugRendererInfoName,
+    WebGLDebugShadersName,
+    WebGLDepthTextureName,
+    WebGLDrawBuffersName,
+    WebGLLoseContextName,
+    WebGLExtensionNameCount, // Must be the last entry
+};
+
+}
+
+#endif // WebGLExtensionName_h