Add methods for determining which PrefStore contains a given preference, and ...

chrome/browser/pref_value_store.h

Index: chrome/browser/pref_value_store.h
===================================================================
--- chrome/browser/pref_value_store.h	(revision 52169)
+++ chrome/browser/pref_value_store.h	(working copy)
@@ -80,11 +80,19 @@
   // or recommended this function should have no effect.
   void RemoveUserPrefValue(const wchar_t* name);
 
-  // Returns true if the preference with the given name is managed.
-  // A preference is managed if a managed value is available for that
-  // preference.
-  bool PrefValueIsManaged(const wchar_t* name);
+  // These methods return true if a preference with the given name is in the
+  // indicated pref store, even if that value is currently being overridden by
+  // a higher-priority source.
+  bool PrefValueInManagedStore(const wchar_t* name);
+  bool PrefValueInExtensionStore(const wchar_t* name);
+  bool PrefValueInUserStore(const wchar_t* name);
 
+  // These methods return true if a preference with the given name is actually
+  // being controlled by the indicated pref store and not being overridden by
+  // a higher-priority source.
+  bool PrefValueFromExtensionStore(const wchar_t* name);
+  bool PrefValueFromUserStore(const wchar_t* name);
+
  private:
   // PrefStores must be listed here in order from highest to lowest priority.
   enum PrefStoreType {
@@ -97,6 +105,10 @@
 
   scoped_ptr<PrefStore> pref_stores_[PREF_STORE_TYPE_MAX + 1];
 
+  bool PrefValueInStore(const wchar_t* name, PrefStoreType type);
+
+  bool PrefValueFromStore(const wchar_t* name, PrefStoreType type);
+
   DISALLOW_COPY_AND_ASSIGN(PrefValueStore);
 };