Move GPU preliminary info collection back to UI thread.

chrome/browser/chrome_browser_main.cc

 // Copyright (c) 2011 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 1845 matching lines @@
   g_browser_process->oom_priority_manager()->Start();
 #endif
 
   // Create the instance of the cloud print proxy service so that it can launch
   // the service process if needed. This is needed because the service process
   // might have shutdown because an update was available.
   // TODO(torne): this should maybe be done with
   // ProfileKeyedServiceFactory::ServiceIsCreatedWithProfile() instead?
   CloudPrintProxyServiceFactory::GetForProfile(profile_);
 
-  // Initialize GpuDataManager and collect preliminary gpu info on FILE thread.
-  // Upon completion, it posts GpuBlacklist auto update task on UI thread.
-  BrowserThread::PostTask(
-      BrowserThread::FILE, FROM_HERE,
-      base::Bind(&GpuBlacklistUpdater::SetupOnFileThread));
+  // Initialize GpuDataManager and collect preliminary gpu info.
+  GpuBlacklistUpdater::Setup();
 
   // Start watching all browser threads for responsiveness.
   ThreadWatcherList::StartWatchingAll(parsed_command_line());
 
 #if !defined(DISABLE_NACL)
   NaClProcessHost::EarlyStartup();
 #endif
 
   // Instantiate the notification UI manager, as this triggers a perf timer
   // used to measure startup time. TODO(stevenjb): Figure out what is actually
@@ skipping 231 matching lines @@
   if (env->GetVar(chrome::kPreReadEnvironmentVariable, &pre_read) &&
       (pre_read == "0" || pre_read == "1")) {
     std::string uma_name(name);
     uma_name += "_PreRead";
     uma_name += pre_read == "1" ? "Enabled" : "Disabled";
     AddPreReadHistogramTime(uma_name.c_str(), time);
   }
 #endif
 #endif
 }