Revert 154457 - Switch from SignedSettings to DeviceSettingsService.

chrome/browser/chromeos/settings/cros_settings.h

Index: chrome/browser/chromeos/settings/cros_settings.h
===================================================================
--- chrome/browser/chromeos/settings/cros_settings.h	(revision 154482)
+++ chrome/browser/chromeos/settings/cros_settings.h	(working copy)
@@ -91,17 +91,13 @@
   // Returns the provider that handles settings with the |path| or prefix.
   CrosSettingsProvider* GetProvider(const std::string& path) const;
 
+  // Forces all providers to reload their caches from the respective backing
+  // stores if they have any.
+  void ReloadProviders();
+
  private:
   friend struct base::DefaultLazyInstanceTraits<CrosSettings>;
-  friend class CrosSettingsTest;
 
-  // Public for testing.
-  CrosSettings();
-  ~CrosSettings();
-
-  // Fires system setting change notification.
-  void FireObservers(const std::string& path);
-
   // List of ChromeOS system settings providers.
   std::vector<CrosSettingsProvider*> providers_;
 
@@ -113,6 +109,12 @@
       SettingsObserverMap;
   SettingsObserverMap settings_observers_;
 
+  CrosSettings();
+  ~CrosSettings();
+
+  // Fires system setting change notification.
+  void FireObservers(const std::string& path);
+
   DISALLOW_COPY_AND_ASSIGN(CrosSettings);
 };