No longer register app window placement preference keys on the fly.

base/prefs/pref_service.h

Index: base/prefs/pref_service.h
diff --git a/base/prefs/pref_service.h b/base/prefs/pref_service.h
index 186433c1b62907c16eb3360ca8d567ca2b1a07a6..56231c364e40dbf1a8a8776cff31eadc527d6a8d 100644
--- a/base/prefs/pref_service.h
+++ b/base/prefs/pref_service.h
@@ -30,12 +30,17 @@ class PrefNotifierImpl;
 class PrefObserver;
 class PrefRegistry;
 class PrefValueStore;
+class PrefService;
 class PrefStore;
 
 namespace base {
 class FilePath;
 }
 
+namespace chrome {
+void MigrateBrowserUIUserPrefs(PrefService* prefs);
+}
+
 namespace subtle {
 class PrefMemberBase;
 class ScopedUserPrefUpdateBase;
@@ -307,6 +312,9 @@ class BASE_PREFS_EXPORT PrefService : public base::NonThreadSafe {
   friend class PrefChangeRegistrar;
   friend class subtle::PrefMemberBase;
 
+  // For access to GetBrowserDictionary below.
+  friend void chrome::MigrateBrowserUIUserPrefs(PrefService* prefs);
+
   // These are protected so they can only be accessed by the friend
   // classes listed above.
   //
@@ -348,6 +356,11 @@ class BASE_PREFS_EXPORT PrefService : public base::NonThreadSafe {
   // actually get the value.).
   const base::Value* GetPreferenceValue(const std::string& path) const;
 
+  // This is only to be used to migrate unregistered prefs to become registered.
+  // TODO(dgrogan): Can be removed when m39 goes to stable. See
+  // http://crbug.com/167256.
+  scoped_ptr<base::DictionaryValue> GetBrowserDictionary() const;
+
   // Local cache of registered Preference objects. The pref_registry_
   // is authoritative with respect to what the types and default values
   // of registered preferences are.