Remove all the ephemeral apps code.

chrome/browser/extensions/extension_sync_service.cc

 // Copyright 2013 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.
 
 #include "chrome/browser/extensions/extension_sync_service.h"
 
 #include "base/auto_reset.h"
 #include "base/basictypes.h"
 #include "base/strings/utf_string_conversions.h"
 #include "chrome/browser/extensions/bookmark_app_helper.h"
@@ skipping 420 matching lines @@
     }
   } else if (!should_be_enabled) {
     // Note that |disable_reasons| includes any pre-existing reasons that
     // weren't explicitly removed above.
     if (extension_service()->IsExtensionEnabled(id))
       extension_service()->DisableExtension(id, disable_reasons);
     else  // Already disabled, just replace the disable reasons.
       extension_prefs->ReplaceDisableReasons(id, disable_reasons);
   }
 
-  // If the target extension has already been installed ephemerally, it can
-  // be promoted to a regular installed extension and downloading from the Web
-  // Store is not necessary.
-  if (extension && extensions::util::IsEphemeralApp(id, profile_))
-    extension_service()->PromoteEphemeralApp(extension, true);
-
   // Update the incognito flag.
   extensions::util::SetIsIncognitoEnabled(
       id, profile_, extension_sync_data.incognito_enabled());
   extension = nullptr;  // No longer safe to use.
 
   // Update the all urls flag.
   if (extension_sync_data.all_urls_enabled() !=
           ExtensionSyncData::BOOLEAN_UNSET) {
     bool allowed = extension_sync_data.all_urls_enabled() ==
         ExtensionSyncData::BOOLEAN_TRUE;
@@ skipping 226 matching lines @@
     if (IsCorrectSyncType(*extension, type) &&
         extensions::util::ShouldSync(extension.get(), profile_) &&
         (include_everything ||
          ExtensionPrefs::Get(profile_)->NeedsSync(extension->id()))) {
       // We should never have pending data for an installed extension.
       DCHECK(!GetSyncBundle(type)->HasPendingExtensionData(extension->id()));
       sync_data_list->push_back(CreateSyncData(*extension));
     }
   }
 }