Delete copy_texture_to_parent_texture from GPU command buffer code.

gpu/command_buffer/client/gles2_implementation_autogen.h

 // Copyright (c) 2011 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
 // DO NOT EDIT!
 
 // This file is included by gles2_implementation.h to declare the
 // GL api functions.
@@ skipping 1248 matching lines @@
     GLuint target, GLintptr offset, GLsizeiptr size, GLenum access);
 
 void UnmapBufferSubDataCHROMIUM(const void* mem);
 
 void* MapTexSubImage2DCHROMIUM(
     GLenum target, GLint level, GLint xoffset, GLint yoffset, GLsizei width,
     GLsizei height, GLenum format, GLenum type, GLenum access);
 
 void UnmapTexSubImage2DCHROMIUM(const void* mem);
 
-void CopyTextureToParentTextureCHROMIUM(
-    GLuint client_child_id, GLuint client_parent_id);
-
 void ResizeCHROMIUM(GLuint width, GLuint height) {
   GPU_CLIENT_LOG("[" << this << "] glResizeCHROMIUM(" << width << ", " << height << ")");  // NOLINT
   helper_->ResizeCHROMIUM(width, height);
 }
 
 const GLchar* GetRequestableExtensionsCHROMIUM();
 
 void RequestExtensionCHROMIUM(const char* extension);
 
 void RateLimitOffscreenContextCHROMIUM();
 
 void SetSurfaceCHROMIUM(GLint surface_id) {
   GPU_CLIENT_LOG("[" << this << "] glSetSurfaceCHROMIUM(" << surface_id << ")");
   helper_->SetSurfaceCHROMIUM(surface_id);
 }
 
 void GetMultipleIntegervCHROMIUM(
     const GLenum* pnames, GLuint count, GLint* results, GLsizeiptr size);
 
 void GetProgramInfoCHROMIUM(
     GLuint program, GLsizei bufsize, GLsizei* size, void* info);
 
 #endif  // GPU_COMMAND_BUFFER_CLIENT_GLES2_IMPLEMENTATION_AUTOGEN_H_