[Command buffer] Enable primitive restart for WebGL 2

gpu/command_buffer/service/context_state.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/context_state.h"
 
 #include <stddef.h>
 
 #include <cmath>
 
@@ skipping 417 matching lines @@
   RestoreProgramBindings();
   RestoreGlobalState(prev_state);
 }
 
 ErrorState* ContextState::GetErrorState() {
   return error_state_.get();
 }
 
 void ContextState::EnableDisable(GLenum pname, bool enable) const {
   if (pname == GL_PRIMITIVE_RESTART_FIXED_INDEX) {
     if (feature_info_->feature_flags().emulate_primitive_restart_fixed_index)

[Zhenyao Mo, 2016/03/29 16:30:15]

nit: {} for the body when there are multiple lines

[Ken Russell (switch to Gerrit), 2016/03/30 01:04:59]

Agree.

[yunchao, 2016/03/30 08:25:22]

Done.

-      pname = GL_PRIMITIVE_RESTART;
+      // GLES2DecoderImpl::DoDrawElements can handle this situation
+      return;
   }
   if (enable) {
     glEnable(pname);
   } else {
     glDisable(pname);
   }
 }
 
 void ContextState::UpdatePackParameters() const {
   if (!feature_info_->IsES3Capable())
@@ skipping 172 matching lines @@
   UpdateUnpackParameters();
 }
 
 // Include the auto-generated part of this file. We split this because it means
 // we can easily edit the non-auto generated parts right here in this file
 // instead of having to edit some template or the code generator.
 #include "gpu/command_buffer/service/context_state_impl_autogen.h"
 
 }  // namespace gles2
 }  // namespace gpu