gpu: Add CHROMIUM_copy_image extension.

gpu/command_buffer/client/gles2_implementation_autogen.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.
 
 // This file is auto-generated from
 // gpu/command_buffer/build_gles2_cmd_buffer.py
 // It's formatted by clang-format using chromium coding style:
 //    clang-format -i -style=chromium filename
 // DO NOT EDIT!
 
@@ skipping 985 matching lines @@
 void BindUniformLocationCHROMIUM(GLuint program,
                                  GLint location,
                                  const char* name) override;
 
 void BindTexImage2DCHROMIUM(GLenum target,
                             GLint imageId,
                             GLint fenceId) override;
 
 void ReleaseTexImage2DCHROMIUM(GLenum target, GLint imageId) 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 TraceBeginCHROMIUM(const char* category_name,
                         const char* trace_name) override;
 
 void TraceEndCHROMIUM() override;
 
 void DiscardFramebufferEXT(GLenum target,
                            GLsizei count,
                            const GLenum* attachments) override;
 
 void LoseContextCHROMIUM(GLenum current, GLenum other) override;
@@ skipping 188 matching lines @@
     GLint location,
     GLboolean transpose,
     const GLfloat* transform) override;
 
 void SwapBuffersWithDamageCHROMIUM(GLint x,
                                    GLint y,
                                    GLint width,
                                    GLint height) override;
 
 #endif  // GPU_COMMAND_BUFFER_CLIENT_GLES2_IMPLEMENTATION_AUTOGEN_H_