Add GL_EXT_multisampled_render_to_texture support to command buffer.

gpu/command_buffer/client/gles2_implementation_impl_autogen.h

 // Copyright (c) 2012 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.cc to define the
 // GL api functions.
@@ skipping 1427 matching lines @@
   if (height < 0) {
     SetGLError(
         GL_INVALID_VALUE, "glRenderbufferStorageMultisampleEXT", "height < 0");
     return;
   }
   helper_->RenderbufferStorageMultisampleEXT(
       target, samples, internalformat, width, height);
   CheckGLError();
 }
 
+void GLES2Implementation::FramebufferTexture2DMultisampleEXT(
+    GLenum target, GLenum attachment, GLenum textarget, GLuint texture,
+    GLint level, GLsizei samples) {
+  GPU_CLIENT_SINGLE_THREAD_CHECK();
+  GPU_CLIENT_LOG("[" << GetLogPrefix() << "] glFramebufferTexture2DMultisampleEXT(" << GLES2Util::GetStringFrameBufferTarget(target) << ", " << GLES2Util::GetStringAttachment(attachment) << ", " << GLES2Util::GetStringTextureTarget(textarget) << ", " << texture << ", " << level << ", " << samples << ")");  // NOLINT
+  if (samples < 0) {
+    SetGLError(
+        GL_INVALID_VALUE, "glFramebufferTexture2DMultisampleEXT", "samples < 0");  // NOLINT
+    return;
+  }
+  helper_->FramebufferTexture2DMultisampleEXT(
+      target, attachment, textarget, texture, level, samples);
+  CheckGLError();
+}
+
 void GLES2Implementation::TexStorage2DEXT(
     GLenum target, GLsizei levels, GLenum internalFormat, GLsizei width,
     GLsizei height) {
   GPU_CLIENT_SINGLE_THREAD_CHECK();
   GPU_CLIENT_LOG("[" << GetLogPrefix() << "] glTexStorage2DEXT(" << GLES2Util::GetStringTextureTarget(target) << ", " << levels << ", " << GLES2Util::GetStringTextureInternalFormatStorage(internalFormat) << ", " << width << ", " << height << ")");  // NOLINT
   if (levels < 0) {
     SetGLError(GL_INVALID_VALUE, "glTexStorage2DEXT", "levels < 0");
     return;
   }
   if (width < 0) {
@@ skipping 256 matching lines @@
   if (count < 0) {
     SetGLError(GL_INVALID_VALUE, "glDrawBuffersEXT", "count < 0");
     return;
   }
   helper_->DrawBuffersEXTImmediate(count, bufs);
   CheckGLError();
 }
 
 #endif  // GPU_COMMAND_BUFFER_CLIENT_GLES2_IMPLEMENTATION_IMPL_AUTOGEN_H_