Add new PPB_OPENGLES2_DRAWBUFFERS_DEV_INTERFACE_1_0 pepper interface.

ppapi/shared_impl/ppb_opengles2_shared.cc

 // Copyright (c) 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 1548 matching lines @@
 
 void VertexAttribDivisorANGLE(PP_Resource context_id,
                               GLuint index,
                               GLuint divisor) {
   Enter3D enter(context_id, true);
   if (enter.succeeded()) {
     ToGles2Impl(&enter)->VertexAttribDivisorANGLE(index, divisor);
   }
 }
 
+void DrawBuffersEXT(PP_Resource context_id, GLsizei count, const GLenum* bufs) {
+  Enter3D enter(context_id, true);
+  if (enter.succeeded()) {
+    ToGles2Impl(&enter)->DrawBuffersEXT(count, bufs);
+  }
+}
+
 }  // namespace
 const PPB_OpenGLES2* PPB_OpenGLES2_Shared::GetInterface() {
   static const struct PPB_OpenGLES2 ppb_opengles2 = {
       &ActiveTexture,                       &AttachShader,
       &BindAttribLocation,                  &BindBuffer,
       &BindFramebuffer,                     &BindRenderbuffer,
       &BindTexture,                         &BlendColor,
       &BlendEquation,                       &BlendEquationSeparate,
       &BlendFunc,                           &BlendFuncSeparate,
       &BufferData,                          &BufferSubData,
@@ skipping 94 matching lines @@
       &MapBufferSubDataCHROMIUM, &UnmapBufferSubDataCHROMIUM,
       &MapTexSubImage2DCHROMIUM, &UnmapTexSubImage2DCHROMIUM};
   return &ppb_opengles2;
 }
 const PPB_OpenGLES2Query* PPB_OpenGLES2_Shared::GetQueryInterface() {
   static const struct PPB_OpenGLES2Query ppb_opengles2 = {
       &GenQueriesEXT, &DeleteQueriesEXT, &IsQueryEXT,          &BeginQueryEXT,
       &EndQueryEXT,   &GetQueryivEXT,    &GetQueryObjectuivEXT};
   return &ppb_opengles2;
 }
+const PPB_OpenGLES2DrawBuffers_Dev*
+PPB_OpenGLES2_Shared::GetDrawBuffersInterface() {  // NOLINT
+  static const struct PPB_OpenGLES2DrawBuffers_Dev ppb_opengles2 = {
+      &DrawBuffersEXT};
+  return &ppb_opengles2;
+}
 }  // namespace ppapi