Make GpuDataManager thread safe.

chrome/browser/chrome_browser_main.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 "chrome/browser/chrome_browser_main.h"
 
 #include <algorithm>
 #include <string>
 #include <vector>
 
@@ skipping 384 matching lines @@
   // silently exit because of missing code in the above test.
   CHECK(profile) << "Cannot get default profile.";
 #endif
 
   return NULL;
 }
 
 // Load GPU Blacklist, collect preliminary gpu info, and compute preliminary
 // gpu feature flags.
 void InitializeGpuDataManager(const CommandLine& parsed_command_line) {
-  content::GpuDataManager::GetInstance();
+  content::GpuDataManager::GetInstance()->InitializeGpuInfo();
   if (parsed_command_line.HasSwitch(switches::kSkipGpuDataLoading) ||
       parsed_command_line.HasSwitch(switches::kIgnoreGpuBlacklist)) {
     return;
   }
 
   const base::StringPiece gpu_blacklist_json(
       ResourceBundle::GetSharedInstance().GetRawDataResource(
           IDR_GPU_BLACKLIST, ui::SCALE_FACTOR_NONE));
   GpuBlacklist* gpu_blacklist = GpuBlacklist::GetInstance();
   bool succeed = gpu_blacklist->LoadGpuBlacklist(
@@ skipping 1147 matching lines @@
     if (base::win::GetVersion() <= base::win::VERSION_XP)
       uma_name += "_XP";
 
     uma_name += "_PreRead_";
     uma_name += pre_read_percentage;
     AddPreReadHistogramTime(uma_name.c_str(), time);
   }
 #endif
 #endif
 }