sync: Implementation of Priority Preferences.

chrome/browser/prefs/pref_service_syncable.h

Index: chrome/browser/prefs/pref_service_syncable.h
diff --git a/chrome/browser/prefs/pref_service_syncable.h b/chrome/browser/prefs/pref_service_syncable.h
index 18926b64cbb494d3d236c08eb44d87373ee41f3b..4aa2e4ede3f73f51289b85fe82111f012c4aaf9b 100644
--- a/chrome/browser/prefs/pref_service_syncable.h
+++ b/chrome/browser/prefs/pref_service_syncable.h
@@ -7,6 +7,7 @@
 
 #include "base/prefs/pref_service.h"
 #include "chrome/browser/prefs/pref_model_associator.h"
+#include "components/user_prefs/pref_registry_syncable.h"
 
 class PrefRegistrySyncable;
 class PrefServiceSyncableObserver;
@@ -63,7 +64,7 @@ class PrefServiceSyncable : public PrefService {
 
   // TODO(zea): Have PrefServiceSyncable implement
   // syncer::SyncableService directly.

[Mattias Nissler (ping if slow), 2013/03/21 06:50:15]

Is that TODO still relevant given that we can't implement both instances in the
same object? Or can we?

-  syncer::SyncableService* GetSyncableService();
+  syncer::SyncableService* GetSyncableService(const syncer::ModelType& type);
 
   // Do not call this after having derived an incognito or per tab pref service.
   virtual void UpdateCommandLinePrefStore(PrefStore* cmd_line_store) OVERRIDE;
@@ -71,16 +72,23 @@ class PrefServiceSyncable : public PrefService {
  private:
   friend class PrefModelAssociator;
 
-  void AddRegisteredSyncablePreference(const char* path);
+  void AddRegisteredSyncablePreference(
+      const char* path,
+      const PrefRegistrySyncable::PrefSyncStatus sync_status);
 
   // Invoked internally when the IsSyncing() state changes.
   void OnIsSyncingChanged();
 
+  // Process a local preference change. This can trigger new SyncChanges being
+  // sent to the syncer.
+  void ProcessPrefChange(const std::string& name);
+
   // Whether CreateIncognitoPrefService() has been called to create a
   // "forked" PrefService.
   bool pref_service_forked_;
 
   PrefModelAssociator pref_sync_associator_;
+  PrefModelAssociator priority_pref_sync_associator_;
 
   ObserverList<PrefServiceSyncableObserver> observer_list_;