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 474 matching lines @@
 
   if (!context->GetTotalGpuMemory(&total_gpu_memory_))
     total_gpu_memory_ = 0;
 
   if (!context_group_->has_program_cache()) {
     context_group_->set_program_cache(
         channel_->gpu_channel_manager()->program_cache());
   }
 
   // Initialize the decoder with either the view or pbuffer GLContext.
-  if (!decoder_->Initialize(surface_,
-                            context,
-                            !surface_id(),
-                            initial_size_,
-                            disallowed_features_,
-                            requested_attribs_)) {
+  if (!decoder_->Initialize(
+          surface_,
+          context,
+          channel_->gpu_channel_manager()->shader_translator_cache(),
+          !surface_id(),
+          initial_size_,
+          disallowed_features_,
+          requested_attribs_)) {
     DLOG(ERROR) << "Failed to initialize decoder.";
     OnInitializeFailed(reply_message);
     return;
   }
 
   gpu_control_.reset(
       new gpu::GpuControlService(context_group_->image_manager(),
                                  NULL,
                                  context_group_->mailbox_manager(),
                                  NULL,
@@ skipping 448 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