Make CopyTextureCHROMIUM restore its own state

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"
 
+namespace gpu {
+namespace gles2 {
+
+class GLES2Decoder;
+
+}  // namespace gles2.
+
 // 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 Initialize(const gles2::GLES2Decoder* decoder);
   void Destroy();
 
-  void DoCopyTexture(GLenum target, GLuint source_id, GLuint dest_id,
-                     GLint level, bool flip_y, bool premultiply_alpha,
+  void DoCopyTexture(const gles2::GLES2Decoder* decoder,
+                     GLenum target, GLuint source_id, GLuint dest_id,
+                     GLint level, GLsizei width, GLsizei height,
+                     bool flip_y, bool premultiply_alpha,
                      bool unpremultiply_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 = 6;
   GLuint programs_[kNumPrograms];
   GLuint buffer_ids_[2];
   GLuint framebuffer_;
   GLuint sampler_locations_[kNumPrograms];
 
   DISALLOW_COPY_AND_ASSIGN(CopyTextureCHROMIUMResourceManager);
 };
 
+}  // namespace gpu.
+
 #endif  // GPU_COMMAND_BUFFER_SERVICE_GLES2_CMD_COPY_TEXTURE_CHROMIUM_H_