Make ShaderTranslatorCache thread safe

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 <algorithm>
 #include <string>
 
 #include "base/command_line.h"
@@ skipping 14 matching lines @@
 #include "gpu/command_buffer/service/transfer_buffer_manager.h"
 #include "ui/gl/gl_implementation.h"
 
 namespace gpu {
 namespace gles2 {
 
 ContextGroup::ContextGroup(
     MailboxManager* mailbox_manager,
     ImageManager* image_manager,
     MemoryTracker* memory_tracker,
+    ShaderTranslatorCache* shader_translator_cache,
     FeatureInfo* feature_info,
     bool bind_generates_resource)
     : mailbox_manager_(mailbox_manager ? mailbox_manager : new MailboxManager),
       image_manager_(image_manager ? image_manager : new ImageManager),
       memory_tracker_(memory_tracker),
+      shader_translator_cache_(shader_translator_cache),
       enforce_gl_minimums_(CommandLine::ForCurrentProcess()->HasSwitch(
           switches::kEnforceGLMinimums)),
       bind_generates_resource_(bind_generates_resource),
       max_vertex_attribs_(0u),
       max_texture_units_(0u),
       max_texture_image_units_(0u),
       max_vertex_texture_image_units_(0u),
       max_fragment_uniform_vectors_(0u),
       max_varying_vectors_(0u),
       max_vertex_uniform_vectors_(0u),
@@ skipping 328 matching lines @@
     GLenum pname, GLint min_required, uint32* v) {
   uint32 value = 0;
   GetIntegerv(pname, &value);
   bool result = CheckGLFeatureU(min_required, &value);
   *v = value;
   return result;
 }
 
 }  // namespace gles2
 }  // namespace gpu