Update from https://crrev.com/320343

gpu/command_buffer/client/gles2_c_lib_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 241 matching lines @@
 }
 void GLES2DrawArrays(GLenum mode, GLint first, GLsizei count) {
   gles2::GetGLContext()->DrawArrays(mode, first, count);
 }
 void GLES2DrawElements(GLenum mode,
                        GLsizei count,
                        GLenum type,
                        const void* indices) {
   gles2::GetGLContext()->DrawElements(mode, count, type, indices);
 }
+void GLES2DrawRangeElements(GLenum mode,
+                            GLuint start,
+                            GLuint end,
+                            GLsizei count,
+                            GLenum type,
+                            const void* indices) {
+  gles2::GetGLContext()->DrawRangeElements(mode, start, end, count, type,
+                                           indices);
+}
 void GLES2Enable(GLenum cap) {
   gles2::GetGLContext()->Enable(cap);
 }
 void GLES2EnableVertexAttribArray(GLuint index) {
   gles2::GetGLContext()->EnableVertexAttribArray(index);
 }
 GLsync GLES2FenceSync(GLenum condition, GLbitfield flags) {
   return gles2::GetGLContext()->FenceSync(condition, flags);
 }
 void GLES2Finish() {
@@ skipping 786 matching lines @@
 void* GLES2MapBufferSubDataCHROMIUM(GLuint target,
                                     GLintptr offset,
                                     GLsizeiptr size,
                                     GLenum access) {
   return gles2::GetGLContext()->MapBufferSubDataCHROMIUM(target, offset, size,
                                                          access);
 }
 void GLES2UnmapBufferSubDataCHROMIUM(const void* mem) {
   gles2::GetGLContext()->UnmapBufferSubDataCHROMIUM(mem);
 }
+void* GLES2MapBufferRange(GLenum target,
+                          GLintptr offset,
+                          GLsizeiptr size,
+                          GLbitfield access) {
+  return gles2::GetGLContext()->MapBufferRange(target, offset, size, access);
+}
+GLboolean GLES2UnmapBuffer(GLenum target) {
+  return gles2::GetGLContext()->UnmapBuffer(target);
+}
 void* GLES2MapTexSubImage2DCHROMIUM(GLenum target,
                                     GLint level,
                                     GLint xoffset,
                                     GLint yoffset,
                                     GLsizei width,
                                     GLsizei height,
                                     GLenum format,
                                     GLenum type,
                                     GLenum access) {
   return gles2::GetGLContext()->MapTexSubImage2DCHROMIUM(
@@ skipping 472 matching lines @@
     },
     {
      "glDrawArrays",
      reinterpret_cast<GLES2FunctionPointer>(glDrawArrays),
     },
     {
      "glDrawElements",
      reinterpret_cast<GLES2FunctionPointer>(glDrawElements),
     },
     {
+     "glDrawRangeElements",
+     reinterpret_cast<GLES2FunctionPointer>(glDrawRangeElements),
+    },
+    {
      "glEnable",
      reinterpret_cast<GLES2FunctionPointer>(glEnable),
     },
     {
      "glEnableVertexAttribArray",
      reinterpret_cast<GLES2FunctionPointer>(glEnableVertexAttribArray),
     },
     {
      "glFenceSync",
      reinterpret_cast<GLES2FunctionPointer>(glFenceSync),
@@ skipping 716 matching lines @@
     },
     {
      "glMapBufferSubDataCHROMIUM",
      reinterpret_cast<GLES2FunctionPointer>(glMapBufferSubDataCHROMIUM),
     },
     {
      "glUnmapBufferSubDataCHROMIUM",
      reinterpret_cast<GLES2FunctionPointer>(glUnmapBufferSubDataCHROMIUM),
     },
     {
+     "glMapBufferRange",
+     reinterpret_cast<GLES2FunctionPointer>(glMapBufferRange),
+    },
+    {
+     "glUnmapBuffer",
+     reinterpret_cast<GLES2FunctionPointer>(glUnmapBuffer),
+    },
+    {
      "glMapTexSubImage2DCHROMIUM",
      reinterpret_cast<GLES2FunctionPointer>(glMapTexSubImage2DCHROMIUM),
     },
     {
      "glUnmapTexSubImage2DCHROMIUM",
      reinterpret_cast<GLES2FunctionPointer>(glUnmapTexSubImage2DCHROMIUM),
     },
     {
      "glResizeCHROMIUM",
      reinterpret_cast<GLES2FunctionPointer>(glResizeCHROMIUM),
@@ skipping 206 matching lines @@
      reinterpret_cast<GLES2FunctionPointer>(glBlendBarrierKHR),
     },
     {
      NULL,
      NULL,
     },
 };
 
 }  // namespace gles2
 #endif  // GPU_COMMAND_BUFFER_CLIENT_GLES2_C_LIB_AUTOGEN_H_