Update from https://crrev.com/320343

gpu/command_buffer/client/gles2_cmd_helper_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 2208 matching lines @@
 void EnableFeatureCHROMIUM(GLuint bucket_id,
                            uint32_t result_shm_id,
                            uint32_t result_shm_offset) {
   gles2::cmds::EnableFeatureCHROMIUM* c =
       GetCmdSpace<gles2::cmds::EnableFeatureCHROMIUM>();
   if (c) {
     c->Init(bucket_id, result_shm_id, result_shm_offset);
   }
 }
 
+void MapBufferRange(GLenum target,
+                    GLintptr offset,
+                    GLsizeiptr size,
+                    GLbitfield access,
+                    uint32_t data_shm_id,
+                    uint32_t data_shm_offset,
+                    uint32_t result_shm_id,
+                    uint32_t result_shm_offset) {
+  gles2::cmds::MapBufferRange* c = GetCmdSpace<gles2::cmds::MapBufferRange>();
+  if (c) {
+    c->Init(target, offset, size, access, data_shm_id, data_shm_offset,
+            result_shm_id, result_shm_offset);
+  }
+}
+
+void UnmapBuffer(GLenum target) {
+  gles2::cmds::UnmapBuffer* c = GetCmdSpace<gles2::cmds::UnmapBuffer>();
+  if (c) {
+    c->Init(target);
+  }
+}
+
 void ResizeCHROMIUM(GLuint width, GLuint height, GLfloat scale_factor) {
   gles2::cmds::ResizeCHROMIUM* c = GetCmdSpace<gles2::cmds::ResizeCHROMIUM>();
   if (c) {
     c->Init(width, height, scale_factor);
   }
 }
 
 void GetRequestableExtensionsCHROMIUM(uint32_t bucket_id) {
   gles2::cmds::GetRequestableExtensionsCHROMIUM* c =
       GetCmdSpace<gles2::cmds::GetRequestableExtensionsCHROMIUM>();
@@ skipping 422 matching lines @@
 }
 
 void BlendBarrierKHR() {
   gles2::cmds::BlendBarrierKHR* c = GetCmdSpace<gles2::cmds::BlendBarrierKHR>();
   if (c) {
     c->Init();
   }
 }
 
 #endif  // GPU_COMMAND_BUFFER_CLIENT_GLES2_CMD_HELPER_AUTOGEN_H_