Compute GpuDriverBugWorkarounds only one time in the GPU process

gpu/command_buffer/service/context_group.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_group.h"
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <algorithm>
@@ skipping 86 matching lines @@
       max_color_attachments_(1u),
       max_draw_buffers_(1u),
       max_dual_source_draw_buffers_(0u),
       max_vertex_output_components_(0u),
       max_fragment_input_components_(0u),
       min_program_texel_offset_(0),
       max_program_texel_offset_(0),
       program_cache_(NULL),
       feature_info_(feature_info) {
   {
+    DCHECK(feature_info_);
     if (!mailbox_manager_.get())
       mailbox_manager_ = new MailboxManagerImpl;
     if (!subscription_ref_set_.get())
       subscription_ref_set_ = new SubscriptionRefSet();
     if (!pending_valuebuffer_state_.get())
       pending_valuebuffer_state_ = new ValueStateMap();
-    if (!feature_info.get())
-      feature_info_ = new FeatureInfo;
     transfer_buffer_manager_ = new TransferBufferManager(memory_tracker_.get());
   }
 }
 
 bool ContextGroup::Initialize(GLES2Decoder* decoder,
                               ContextType context_type,
                               const DisallowedFeatures& disallowed_features) {
   if (HaveContexts()) {
     if (context_type != feature_info_->context_type()) {
       LOG(ERROR) << "ContextGroup::Initialize failed because the type of "
@@ skipping 441 matching lines @@
     GLuint client_id, GLuint* service_id) const {
   Buffer* buffer = buffer_manager_->GetBuffer(client_id);
   if (!buffer)
     return false;
   *service_id = buffer->service_id();
   return true;
 }
 
 }  // namespace gles2
 }  // namespace gpu