Signed settings refactoring: Proper caching and more tests.

chrome/browser/ui/webui/options/chromeos/system_settings_provider.h

Index: chrome/browser/ui/webui/options/chromeos/system_settings_provider.h
diff --git a/chrome/browser/ui/webui/options/chromeos/system_settings_provider.h b/chrome/browser/ui/webui/options/chromeos/system_settings_provider.h
index 4ac725a2e541c0a7cdc3c223121c675e906586a8..ef343d10ddc1af514ae91c1dac5cc0e5cd099cd6 100644
--- a/chrome/browser/ui/webui/options/chromeos/system_settings_provider.h
+++ b/chrome/browser/ui/webui/options/chromeos/system_settings_provider.h
@@ -28,10 +28,11 @@ class SystemSettingsProvider : public CrosSettingsProvider,
   virtual ~SystemSettingsProvider();
 
   // CrosSettingsProvider overrides.
-  virtual const base::Value* Get(const std::string& path) const OVERRIDE;
+  virtual base::Value* Get(const std::string& path) const OVERRIDE;
   virtual bool GetTrusted(const std::string& path,
-                          const base::Closure& callback) const OVERRIDE;
+                          const base::Closure& callback) OVERRIDE;
   virtual bool HandlesSetting(const std::string& path) const OVERRIDE;
+  virtual void Reload() OVERRIDE;
 
   // Overridden from TimezoneSettings::Observer:
   virtual void TimezoneChanged(const icu::TimeZone& timezone) OVERRIDE;
@@ -64,8 +65,6 @@ class SystemSettingsProvider : public CrosSettingsProvider,
 
   // Timezones.
   std::vector<icu::TimeZone*> timezones_;
-  // TODO(pastarmovj): This will be cached in the local_state PrefStore soon.
-  mutable scoped_ptr<base::StringValue> system_timezone_;
 
   DISALLOW_COPY_AND_ASSIGN(SystemSettingsProvider);
 };