Remove all the ephemeral apps code.

chrome/browser/extensions/crx_installer.h

 // Copyright (c) 2012 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_EXTENSIONS_CRX_INSTALLER_H_
 #define CHROME_BROWSER_EXTENSIONS_CRX_INSTALLER_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 180 matching lines @@
     page_ordinal_ = page_ordinal;
   }
 
   void set_error_on_unsupported_requirements(bool val) {
     error_on_unsupported_requirements_ = val;
   }
 
   void set_install_immediately(bool val) {
     set_install_flag(kInstallFlagInstallImmediately, val);
   }
-  void set_is_ephemeral(bool val) {
-    set_install_flag(kInstallFlagIsEphemeral, val);
-  }
   void set_do_not_sync(bool val) {
     set_install_flag(kInstallFlagDoNotSync, val);
   }
 
   bool did_handle_successfully() const { return did_handle_successfully_; }
 
   Profile* profile() { return install_checker_.profile(); }
 
   const Extension* extension() { return install_checker_.extension().get(); }
 
@@ skipping 228 matching lines @@
 
   // Performs requirements, policy and blacklist checks on the extension.
   ExtensionInstallChecker install_checker_;
 
   DISALLOW_COPY_AND_ASSIGN(CrxInstaller);
 };
 
 }  // namespace extensions
 
 #endif  // CHROME_BROWSER_EXTENSIONS_CRX_INSTALLER_H_