Make ShaderTranslatorCache thread safe

content/common/gpu/gpu_command_buffer_stub.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 "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/command_line.h"
 #include "base/debug/trace_event.h"
 #include "base/hash.h"
 #include "base/memory/shared_memory.h"
@@ skipping 128 matching lines @@
       total_gpu_memory_(0) {
   active_url_hash_ = base::Hash(active_url.possibly_invalid_spec());
   FastSetActiveURL(active_url_, active_url_hash_);
   if (share_group) {
     context_group_ = share_group->context_group_;
   } else {
     context_group_ = new gpu::gles2::ContextGroup(
         mailbox_manager,
         image_manager,
         new GpuCommandBufferMemoryTracker(channel),
+        channel_->gpu_channel_manager()->shader_translator_cache(),
         NULL,
         true);
   }
 
   use_virtualized_gl_context_ |=
       context_group_->feature_info()->workarounds().use_virtualized_gl_contexts;
 }
 
 GpuCommandBufferStub::~GpuCommandBufferStub() {
   Destroy();
@@ skipping 805 matching lines @@
   if (decoder_)
     decoder_->LoseContext(GL_UNKNOWN_CONTEXT_RESET_ARB);
   command_buffer_->SetParseError(gpu::error::kLostContext);
 }
 
 uint64 GpuCommandBufferStub::GetMemoryUsage() const {
   return GetMemoryManager()->GetClientMemoryUsage(this);
 }
 
 }  // namespace content