Revert 281130 "Replace "external_install" boolean parameter with..."

trunk/src/chrome/browser/apps/drive/drive_app_provider.cc

Index: trunk/src/chrome/browser/apps/drive/drive_app_provider.cc
===================================================================
--- trunk/src/chrome/browser/apps/drive/drive_app_provider.cc	(revision 281226)
+++ trunk/src/chrome/browser/apps/drive/drive_app_provider.cc	(working copy)
@@ -82,9 +82,7 @@
   if (existing_app && is_existing_app_generated) {
     extensions::ExtensionSystem::Get(profile_)
         ->extension_service()
-        ->UninstallExtension(existing_chrome_app_id,
-                             ExtensionService::UNINSTALL_REASON_SYNC,
-                             NULL);
+        ->UninstallExtension(existing_chrome_app_id, false, NULL);
   }
 }
 
@@ -193,8 +191,7 @@
 
   extensions::ExtensionSystem::Get(profile_)
       ->extension_service()
-      ->UninstallExtension(
-          chrome_app_id, ExtensionService::UNINSTALL_REASON_SYNC, NULL);
+      ->UninstallExtension(chrome_app_id, false, NULL);
 }
 
 void DriveAppProvider::OnDriveAppRegistryUpdated() {