Add CopyTexSubImage3D to GPU command buffer.

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 129 matching lines @@
 
 void CopyTexSubImage2D(GLenum target,
                        GLint level,
                        GLint xoffset,
                        GLint yoffset,
                        GLint x,
                        GLint y,
                        GLsizei width,
                        GLsizei height) override;
 
+void CopyTexSubImage3D(GLenum target,
+                       GLint level,
+                       GLint xoffset,
+                       GLint yoffset,
+                       GLint zoffset,
+                       GLint x,
+                       GLint y,
+                       GLsizei width,
+                       GLsizei height) override;
+
 GLuint CreateProgram() override;
 
 GLuint CreateShader(GLenum type) override;
 
 void CullFace(GLenum mode) override;
 
 void DeleteBuffers(GLsizei n, const GLuint* buffers) override;
 
 void DeleteFramebuffers(GLsizei n, const GLuint* framebuffers) override;
 
@@ skipping 748 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_