Make ShaderTranslatorCache thread safe

mojo/services/gles2/command_buffer_impl.cc

 // Copyright 2013 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 "mojo/services/gles2/command_buffer_impl.h"
 
 #include "base/bind.h"
 #include "base/memory/shared_memory.h"
 
 #include "gpu/command_buffer/common/constants.h"
@@ skipping 59 matching lines @@
 
   // TODO(piman): context sharing, virtual contexts, gpu preference.
   scoped_refptr<gfx::GLContext> context = gfx::GLContext::CreateGLContext(
       NULL, surface.get(), gfx::PreferIntegratedGpu);
   if (!context.get())
     return false;
 
   if (!context->MakeCurrent(surface.get()))
     return false;
 
+  // TODO(piman): ShaderTranslatorCache is currently per-ContextGroup but
+  // only needs to be per-thread.
   scoped_refptr<gpu::gles2::ContextGroup> context_group =
-      new gpu::gles2::ContextGroup(
-          NULL, NULL, new MemoryTrackerStub(), NULL, true);
+      new gpu::gles2::ContextGroup(NULL,
+                                   NULL,
+                                   new MemoryTrackerStub,
+                                   new gpu::gles2::ShaderTranslatorCache,
+                                   NULL,
+                                   true);
+
   command_buffer_.reset(
       new gpu::CommandBufferService(context_group->transfer_buffer_manager()));
   bool result = command_buffer_->Initialize();
   DCHECK(result);
 
   decoder_.reset(::gpu::gles2::GLES2Decoder::Create(context_group.get()));
   scheduler_.reset(new gpu::GpuScheduler(
       command_buffer_.get(), decoder_.get(), decoder_.get()));
   decoder_->set_engine(scheduler_.get());
 
@@ skipping 85 matching lines @@
 
 void CommandBufferImpl::OnParseError() {
   gpu::CommandBuffer::State state = command_buffer_->GetState();
   client_->LostContext(state.context_lost_reason);
 }
 
 void CommandBufferImpl::DrawAnimationFrame() { client_->DrawAnimationFrame(); }
 
 }  // namespace services
 }  // namespace mojo