Added the AutomaticProfileResetter service.

base/prefs/pref_service.h

 // Copyright (c) 2012 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.
 
 // This provides a way to access the application's current preferences.
 
 // Chromium settings and storage represent user-selected preferences and
 // information and MUST not be extracted, overwritten or modified except
 // through Chromium defined APIs.
 
@@ skipping 218 matching lines @@
   // Returns true if a value has been set for the specified path.
   // NOTE: this is NOT the same as FindPreference. In particular
   // FindPreference returns whether RegisterXXX has been invoked, where as
   // this checks if a value exists for the path.
   bool HasPrefPath(const char* path) const;
 
   // Returns a dictionary with effective preference values. The ownership
   // is passed to the caller.
   base::DictionaryValue* GetPreferenceValues() const;
 
+  // Returns a flat dictionary with effective preference values, that is, will
+  // not split paths on '.' characters to get values into nested dictionaries.
+  // The ownership is passed to the caller.

[battre, 2013/09/25 09:43:26]

My suggestion:

Returns a dictionary with effective preference values. Contrary to
GetPreferenceValues() the paths of registered preferences are not split on '.'
characters. If a registered preference stores a dictionary, this will use the
typical nesting on '.' characters. If "foo.bar" is a registered preference, the
result could look like this: { "foo.bar": {"a": {"b": true} } }.
The ownership is passed to the caller.

[robertshield, 2013/09/25 20:18:12]

Don't have much to add other than a big +1 on providing an example in the
comment.

[engedy, 2013/09/27 23:27:34]

Done.

+  base::DictionaryValue* GetPreferenceValuesWithoutPathExpansion() const;
+
   bool ReadOnly() const;
 
   PrefInitializationStatus GetInitializationStatus() const;
 
   // Tell our PrefValueStore to update itself to |command_line_store|.
   // Takes ownership of the store.
   virtual void UpdateCommandLinePrefStore(PrefStore* command_line_store);
 
   // We run the callback once, when initialization completes. The bool
   // parameter will be set to true for successful initialization,
@@ skipping 96 matching lines @@
 
   // Local cache of registered Preference objects. The pref_registry_
   // is authoritative with respect to what the types and default values
   // of registered preferences are.
   mutable PreferenceMap prefs_map_;
 
   DISALLOW_COPY_AND_ASSIGN(PrefService);
 };
 
 #endif  // BASE_PREFS_PREF_SERVICE_H_