Add GLES2Interface version of TWGC3D

cc/test/test_web_graphics_context_3d.h

 // Copyright 2013 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 CC_TEST_TEST_WEB_GRAPHICS_CONTEXT_3D_H_
 #define CC_TEST_TEST_WEB_GRAPHICS_CONTEXT_3D_H_
 
 #include <vector>
 
 #include "base/compiler_specific.h"
@@ skipping 175 matching lines @@
   }
 
   size_t NumTextures() const;
   blink::WebGLId TextureAt(int i) const;
 
   size_t NumUsedTextures() const { return used_textures_.size(); }
   bool UsedTexture(int texture) const {
     return ContainsKey(used_textures_, texture);
   }
   void ResetUsedTextures() { used_textures_.clear(); }
-  unsigned AllocateTestTextureForExternalUse();
 
   void set_support_swapbuffers_complete_callback(bool support) {
     test_capabilities_.swapbuffers_complete_callback = support;
   }
   void set_have_extension_io_surface(bool have) {
     test_capabilities_.iosurface = have;
     test_capabilities_.texture_rectangle = have;
   }
   void set_have_extension_egl_image(bool have) {
     test_capabilities_.egl_image_external = have;
@@ skipping 154 matching lines @@
 
   scoped_refptr<Namespace> namespace_;
   static Namespace* shared_namespace_;
 
   base::WeakPtrFactory<TestWebGraphicsContext3D> weak_ptr_factory_;
 };
 
 }  // namespace cc
 
 #endif  // CC_TEST_TEST_WEB_GRAPHICS_CONTEXT_3D_H_