Remove all the ephemeral apps code.

extensions/browser/extension_prefs.h

 // Copyright 2014 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 EXTENSIONS_BROWSER_EXTENSION_PREFS_H_
 #define EXTENSIONS_BROWSER_EXTENSION_PREFS_H_
 
 #include <set>
 #include <string>
 #include <vector>
@@ skipping 434 matching lines @@
   // for |extension_id|, if we have any. Otherwise returns NULL.
   scoped_ptr<ExtensionInfo> GetDelayedInstallInfo(
       const std::string& extension_id) const;
 
   DelayReason GetDelayedInstallReason(const std::string& extension_id) const;
 
   // Returns information about all the extensions that have delayed install
   // information.
   scoped_ptr<ExtensionsInfo> GetAllDelayedInstallInfo() const;
 
-  // Returns true if the extension is an ephemeral app.
-  bool IsEphemeralApp(const std::string& extension_id) const;
-
-  // Promotes an ephemeral app to a regular installed app.
-  void OnEphemeralAppPromoted(const std::string& extension_id);
-
   // Returns true if the user repositioned the app on the app launcher via drag
   // and drop.
   bool WasAppDraggedByUser(const std::string& extension_id) const;
 
   // Sets a flag indicating that the user repositioned the app on the app
   // launcher by drag and dropping it.
   void SetAppDraggedByUser(const std::string& extension_id);
 
   // Returns true if there is an extension which controls the preference value
   //  for |pref_key| *and* it is specific to incognito mode.
@@ skipping 231 matching lines @@
   bool extensions_disabled_;
 
   base::ObserverList<ExtensionPrefsObserver> observer_list_;
 
   DISALLOW_COPY_AND_ASSIGN(ExtensionPrefs);
 };
 
 }  // namespace extensions
 
 #endif  // EXTENSIONS_BROWSER_EXTENSION_PREFS_H_