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

chrome/browser/pref_value_store.h

 // Copyright (c) 2010 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.
 
 #ifndef CHROME_BROWSER_PREF_VALUE_STORE_H_
 #define CHROME_BROWSER_PREF_VALUE_STORE_H_
 
 #include "base/basictypes.h"
 #include "base/file_path.h"
 #include "base/string16.h"
@@ skipping 62 matching lines @@
   // preference is managed. Instead GetValue will return the managed value
   // of the preference. Note that the PrefValueStore takes the ownership of
   // the value referenced by |in_value|. It is an error to call this when no
   // user PrefStore has been set.
   void SetUserPrefValue(const wchar_t* name, Value* in_value);
 
   // Removes a value from the PrefValueStore. If a preference is managed
   // 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 {
     MANAGED = 0,
     EXTENSION,
     USER,
     RECOMMENDED,
     PREF_STORE_TYPE_MAX = RECOMMENDED
   };
 
   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);
 };
 
 #endif  // CHROME_BROWSER_PREF_VALUE_STORE_H_