gpu: introduce glCopySubTextureCHROMIUM

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 820 matching lines @@
                                  GLuint ioSurfaceId,
                                  GLuint plane) override;
 
 void CopyTextureCHROMIUM(GLenum target,
                          GLenum source_id,
                          GLenum dest_id,
                          GLint level,
                          GLint internalformat,
                          GLenum dest_type) override;
 
+void CopySubTextureCHROMIUM(GLenum target,
+                            GLenum source_id,
+                            GLenum dest_id,
+                            GLint level,
+                            GLint xoffset,
+                            GLint yoffset) override;
+
 void DrawArraysInstancedANGLE(GLenum mode,
                               GLint first,
                               GLsizei count,
                               GLsizei primcount) override;
 
 void DrawElementsInstancedANGLE(GLenum mode,
                                 GLsizei count,
                                 GLenum type,
                                 const void* indices,
                                 GLsizei primcount) override;
@@ skipping 94 matching lines @@
 
 void SwapInterval(GLint interval) override;
 
 void MatrixLoadfCHROMIUM(GLenum matrixMode, const GLfloat* m) override;
 
 void MatrixLoadIdentityCHROMIUM(GLenum matrixMode) override;
 
 void BlendBarrierKHR() override;
 
 #endif  // GPU_COMMAND_BUFFER_CLIENT_GLES2_IMPLEMENTATION_AUTOGEN_H_