Revert 132934 - this change seems to break many webgl related layout tests

gpu/command_buffer/service/gles2_cmd_copy_texture_chromium.h

-// Copyright (c) 2012 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 GPU_COMMAND_BUFFER_SERVICE_GLES2_CMD_COPY_TEXTURE_CHROMIUM_H_
-#define GPU_COMMAND_BUFFER_SERVICE_GLES2_CMD_COPY_TEXTURE_CHROMIUM_H_
-
-#include "gpu/command_buffer/service/gl_utils.h"
-
-// This class encapsulates the resources required to implement the
-// GL_CHROMIUM_copy_texture extension.  The copy operation is performed
-// via a blit to a framebuffer object.
-class CopyTextureCHROMIUMResourceManager {
- public:
-  CopyTextureCHROMIUMResourceManager() : initialized_(false) {}
-
-  void Initialize();
-  void Destroy();
-
-  void DoCopyTexture(GLenum target, GLuint source_id, GLuint dest_id,
-                     GLint level, bool flip_y, bool premultiply_alpha);
-
-  // The attributes used during invocation of the extension.
-  static const GLuint kVertexPositionAttrib = 0;
-  static const GLuint kVertexTextureAttrib = 1;
-
- private:
-  bool initialized_;
-
-  static const int kNumPrograms = 4;
-  GLuint programs_[kNumPrograms];
-  GLuint buffer_ids_[2];
-  GLuint framebuffer_;
-  GLuint sampler_locations_[kNumPrograms];
-
-  DISALLOW_COPY_AND_ASSIGN(CopyTextureCHROMIUMResourceManager);
-};
-
-#endif  // GPU_COMMAND_BUFFER_SERVICE_GLES2_CMD_COPY_TEXTURE_CHROMIUM_H_
-
-