gpu: Extend CopyTextureCHROMIUM with support for copying part of source texture.

mojo/gpu/mojo_gles2_impl_autogen.cc

 // 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 1434 matching lines @@
                                         GLenum source_id,
                                         GLenum dest_id,
                                         GLint internalformat,
                                         GLenum dest_type) {
   NOTREACHED() << "Unimplemented CopyTextureCHROMIUM.";
 }
 void MojoGLES2Impl::CopySubTextureCHROMIUM(GLenum target,
                                            GLenum source_id,
                                            GLenum dest_id,
                                            GLint xoffset,
-                                           GLint yoffset) {
+                                           GLint yoffset,
+                                           GLint x,
+                                           GLint y,
+                                           GLsizei width,
+                                           GLsizei height) {
   NOTREACHED() << "Unimplemented CopySubTextureCHROMIUM.";
 }
 void MojoGLES2Impl::DrawArraysInstancedANGLE(GLenum mode,
                                              GLint first,
                                              GLsizei count,
                                              GLsizei primcount) {
   NOTREACHED() << "Unimplemented DrawArraysInstancedANGLE.";
 }
 void MojoGLES2Impl::DrawElementsInstancedANGLE(GLenum mode,
                                                GLsizei count,
@@ skipping 143 matching lines @@
   NOTREACHED() << "Unimplemented MatrixLoadfCHROMIUM.";
 }
 void MojoGLES2Impl::MatrixLoadIdentityCHROMIUM(GLenum matrixMode) {
   NOTREACHED() << "Unimplemented MatrixLoadIdentityCHROMIUM.";
 }
 void MojoGLES2Impl::BlendBarrierKHR() {
   NOTREACHED() << "Unimplemented BlendBarrierKHR.";
 }
 
 }  // namespace mojo