texture_manager: disable cubemap workaround on ES3

gpu/command_buffer/service/texture_manager.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.
 
 #include "gpu/command_buffer/service/texture_manager.h"
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <algorithm>
@@ skipping 2365 matching lines @@
   TextureRef* texture_ref;
   if (!ValidateTexImage(state, function_name, args, &texture_ref)) {
     return;
   }
 
   Buffer* buffer = state->bound_pixel_unpack_buffer.get();
 
   // ValidateTexImage is passed already.
   Texture* texture = texture_ref->texture();
   bool need_cube_map_workaround =
+      !feature_info_->IsES3Enabled() &&
       texture->target() == GL_TEXTURE_CUBE_MAP &&
       (texture_state->force_cube_complete ||
        (texture_state->force_cube_map_positive_x_allocation &&
         args.target != GL_TEXTURE_CUBE_MAP_POSITIVE_X));
   if (need_cube_map_workaround && !buffer) {
     // TODO(zmo): The following code does not work with an unpack buffer bound.
     std::vector<GLenum> undefined_faces;
     if (texture_state->force_cube_complete) {
       int width = 0;
       int height = 0;
@@ skipping 982 matching lines @@
 uint32_t TextureManager::GetServiceIdGeneration() const {
   return current_service_id_generation_;
 }
 
 void TextureManager::IncrementServiceIdGeneration() {
   current_service_id_generation_++;
 }
 
 }  // namespace gles2
 }  // namespace gpu