gpu: Add CHROMIUM_copy_image extension.

cc/test/test_gles2_interface.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_GLES2_INTERFACE_H_
 #define CC_TEST_TEST_GLES2_INTERFACE_H_
 
 #include "gpu/command_buffer/client/gles2_interface_stub.h"
 
 namespace cc {
@@ skipping 95 matching lines @@
                              GLenum internalformat) override;
   void DestroyImageCHROMIUM(GLuint image_id) override;
   GLuint CreateGpuMemoryBufferImageCHROMIUM(GLsizei width,
                                             GLsizei height,
                                             GLenum internalformat,
                                             GLenum usage) override;
   void BindTexImage2DCHROMIUM(GLenum target,
                               GLint image_id,
                               GLint fence_id) override;
   void ReleaseTexImage2DCHROMIUM(GLenum target, GLint image_id) override;
+  void CopyImageSubDataCHROMIUM(GLint source_image_id,
+                                GLint dest_texture_id,
+                                GLint xoffset,
+                                GLint yoffset,
+                                GLint x,
+                                GLint y,
+                                GLsizei width,
+                                GLsizei height,
+                                GLint in_fence_id,
+                                GLint out_fence_id) override;
   void FramebufferRenderbuffer(GLenum target,
                                GLenum attachment,
                                GLenum renderbuffertarget,
                                GLuint renderbuffer) override;
   void FramebufferTexture2D(GLenum target,
                             GLenum attachment,
                             GLenum textarget,
                             GLuint texture,
                             GLint level) override;
   void RenderbufferStorage(GLenum target,
@@ skipping 43 matching lines @@
  protected:
   virtual void InitializeTestContext(TestWebGraphicsContext3D* context) {}
 
  protected:
   TestWebGraphicsContext3D* test_context_ = nullptr;
 };
 
 }  // namespace cc
 
 #endif  // CC_TEST_TEST_GLES2_INTERFACE_H_