Update from https://crrev.com/320343

gpu/command_buffer/common/gles2_cmd_utils.cc

 // 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 here so other GLES2 related files can have a common set of
 // includes where appropriate.
 
 #include <sstream>
 #include <GLES2/gl2.h>
 #include <GLES2/gl2ext.h>
@@ skipping 852 matching lines @@
   *v32_0 = static_cast<uint32_t>(v64 & 0xFFFFFFFF);
   *v32_1 = static_cast<uint32_t>((v64 & 0xFFFFFFFF00000000) >> 32);
 }
 
 // static
 uint64_t GLES2Util::MapTwoUint32ToUint64(uint32_t v32_0, uint32_t v32_1) {
   uint64_t v64 = v32_1;
   return (v64 << 32) | v32_0;
 }
 
+// static
+uint32_t GLES2Util::MapBufferTargetToBindingEnum(uint32_t target) {
+  switch (target) {
+    case GL_ARRAY_BUFFER:
+      return GL_ARRAY_BUFFER_BINDING;
+    case GL_COPY_READ_BUFFER:
+      return GL_COPY_READ_BUFFER_BINDING;
+    case GL_COPY_WRITE_BUFFER:
+      return GL_COPY_WRITE_BUFFER_BINDING;
+    case GL_ELEMENT_ARRAY_BUFFER:
+      return GL_ELEMENT_ARRAY_BUFFER_BINDING;
+    case GL_PIXEL_PACK_BUFFER:
+      return GL_PIXEL_PACK_BUFFER_BINDING;
+    case GL_PIXEL_UNPACK_BUFFER:
+      return GL_PIXEL_UNPACK_BUFFER_BINDING;
+    case GL_TRANSFORM_FEEDBACK_BUFFER:
+      return GL_TRANSFORM_FEEDBACK_BUFFER_BINDING;
+    case GL_UNIFORM_BUFFER:
+      return GL_UNIFORM_BUFFER_BINDING;
+    default:
+      return 0;
+  }
+}
+
+
 namespace {
 
 // WebGraphicsContext3DCommandBufferImpl configuration attributes. Those in
 // the 16-bit range are the same as used by EGL. Those outside the 16-bit range
 // are unique to Chromium. Attributes are matched using a closest fit algorithm.
 
 // From <EGL/egl.h>.
 const int32 kAlphaSize       = 0x3021;  // EGL_ALPHA_SIZE
 const int32 kBlueSize        = 0x3022;  // EGL_BLUE_SIZE
 const int32 kGreenSize       = 0x3023;  // EGL_GREEN_SIZE
@@ skipping 140 matching lines @@
   }
 
   return true;
 }
 
 #include "gpu/command_buffer/common/gles2_cmd_utils_implementation_autogen.h"
 
 }  // namespace gles2
 }  // namespace gpu