Make SystemMonitor not a Singleton and move it out of base

chrome/browser/profile_manager.cc

 // Copyright (c) 2009 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 <set>
 
 #include "chrome/browser/profile_manager.h"
 
 #include "app/l10n_util.h"
 #include "base/file_util.h"
@@ skipping 24 matching lines @@
 }
 
 // static
 void ProfileManager::ShutdownSessionServices() {
   ProfileManager* pm = g_browser_process->profile_manager();
   for (ProfileManager::const_iterator i = pm->begin(); i != pm->end(); ++i)
     (*i)->ShutdownSessionService();
 }
 
 ProfileManager::ProfileManager() {
-  base::SystemMonitor::Get()->AddObserver(this);
+  SystemMonitor::Get()->AddObserver(this);
 }
 
 ProfileManager::~ProfileManager() {
-  base::SystemMonitor* system_monitor = base::SystemMonitor::Get();
+  SystemMonitor* system_monitor = SystemMonitor::Get();
   if (system_monitor)
     system_monitor->RemoveObserver(this);
 
   // Destroy all profiles that we're keeping track of.
   for (const_iterator i(begin()); i != end(); ++i)
     delete *i;
   profiles_.clear();
 
   // Get rid of available profile list
   for (AvailableProfileVector::const_iterator i(available_profiles_.begin());
@@ skipping 252 matching lines @@
 
   return profile;
 }
 
 // static
 std::wstring ProfileManager::CanonicalizeID(const std::wstring& id) {
   std::wstring no_whitespace;
   TrimWhitespace(id, TRIM_ALL, &no_whitespace);
   return StringToLowerASCII(no_whitespace);
 }