Replace "external_install" boolean parameter with explicit enumeration in ExtensionUninstall method.

chrome/browser/apps/ephemeral_app_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/apps/ephemeral_app_service.h"
 
 #include "base/command_line.h"
 #include "chrome/browser/apps/ephemeral_app_service_factory.h"
 #include "chrome/browser/chrome_notification_types.h"
 #include "chrome/browser/extensions/extension_service.h"
@@ skipping 176 matching lines @@
   }
 
   ExtensionService* service =
       ExtensionSystem::Get(profile_)->extension_service();
   DCHECK(service);
   // Execute the replacement policies and remove apps marked for deletion.
   if (!app_launch_times.empty()) {
     GetAppsToRemove(app_count, app_launch_times, &remove_app_ids);
     for (std::set<std::string>::const_iterator id = remove_app_ids.begin();
          id != remove_app_ids.end(); ++id) {
-      if (service->UninstallExtension(*id, false, NULL))
+      if (service->UninstallExtension(
+              *id,
+              ExtensionService::UNINSTALL_REASON_ORPHANED_EPHEMERAL_EXTENSION,
+              NULL)) {
         --app_count;
+      }
     }
   }
 
   ephemeral_app_count_ = app_count;
 }
 
 // static
 void EphemeralAppService::GetAppsToRemove(
     int app_count,
     const LaunchTimeAppMap& app_launch_times,
@@ skipping 15 matching lines @@
     // Remove ephemeral apps that have been inactive for a while or if the cache
     // is larger than the desired size.
     if (it->first < inactive_threshold || app_count > kMaxEphemeralAppsCount) {
       remove_app_ids->insert(it->second);
       --app_count;
     } else {
       break;
     }
   }
 }