Have content/ create and destroy its own threads.

chrome/browser/omnibox_search_hint.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/omnibox_search_hint.h"
 
 #include "base/command_line.h"
+#include "base/message_loop.h"
 #include "base/metrics/histogram.h"
 #include "base/task.h"
 // TODO(avi): remove when conversions not needed any more
 #include "base/utf_string_conversions.h"
 #include "chrome/browser/autocomplete/autocomplete.h"
 #include "chrome/browser/autocomplete/autocomplete_edit.h"
 #include "chrome/browser/autocomplete/autocomplete_match.h"
 #include "chrome/browser/infobars/infobar_tab_helper.h"
 #include "chrome/browser/prefs/pref_service.h"
 #include "chrome/browser/profiles/profile.h"
@@ skipping 209 matching lines @@
 }
 
 // static
 bool OmniboxSearchHint::IsEnabled(Profile* profile) {
   // The infobar can only be shown if the correct switch has been provided and
   // the user did not dismiss the infobar before.
   return profile->GetPrefs()->GetBoolean(prefs::kShowOmniboxSearchHint) &&
       CommandLine::ForCurrentProcess()->HasSwitch(
       switches::kSearchInOmniboxHint);
 }