Don't install external extensions in tests

chrome/browser/extensions/external_provider_impl.cc

 // 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.
 
 #include "chrome/browser/extensions/external_provider_impl.h"
 
 #include "base/command_line.h"
 #include "base/file_path.h"
 #include "base/logging.h"
 #include "base/memory/linked_ptr.h"
@@ skipping 296 matching lines @@
     *location = loc;
 
   return true;
 }
 
 // static
 void ExternalProviderImpl::CreateExternalProviders(
     VisitorInterface* service,
     Profile* profile,
     ProviderCollection* provider_list) {
+  // Policies are mandatory so they can't be skipped with command line flag.
+  provider_list->push_back(
+      linked_ptr<ExternalProviderInterface>(
+          new ExternalProviderImpl(
+              service,
+              new ExternalPolicyLoader(profile),
+              Extension::INVALID,
+              Extension::EXTERNAL_POLICY_DOWNLOAD,
+              Extension::NO_FLAGS)));
+
+  // In tests don't install extensions from default external sources.
+  // It would only slowdown tests and make them flaky.
+  if (CommandLine::ForCurrentProcess()->HasSwitch(
+      switches::kDisableDefaultApps))
+    return;
 
   // On Mac OS, items in /Library/... should be written by the superuser.
   // Check that all components of the path are writable by root only.
   ExternalPrefLoader::Options check_admin_permissions_on_mac;
 #if defined(OS_MACOSX)
   check_admin_permissions_on_mac =
     ExternalPrefLoader::ENSURE_PATH_CONTROLLED_BY_ADMIN;
 #else
   check_admin_permissions_on_mac = ExternalPrefLoader::NONE;
 #endif
@@ skipping 51 matching lines @@
       linked_ptr<ExternalProviderInterface>(
           new ExternalProviderImpl(
               service,
               new ExternalPrefLoader(chrome::DIR_STANDALONE_EXTERNAL_EXTENSIONS,
                                      ExternalPrefLoader::NONE),
               Extension::EXTERNAL_PREF,
               Extension::EXTERNAL_PREF_DOWNLOAD,
               bundled_extension_creation_flags)));
 #endif
 
-  provider_list->push_back(
-      linked_ptr<ExternalProviderInterface>(
-          new ExternalProviderImpl(
-              service,
-              new ExternalPolicyLoader(profile),
-              Extension::INVALID,
-              Extension::EXTERNAL_POLICY_DOWNLOAD,
-              Extension::NO_FLAGS)));
-
 #if !defined(OS_CHROMEOS)
   // The default apps are installed as INTERNAL but use the external
   // extension installer codeflow.
   provider_list->push_back(
       linked_ptr<ExternalProviderInterface>(
           new default_apps::Provider(
               profile,
               service,
               new ExternalPrefLoader(chrome::DIR_DEFAULT_APPS,
                                      ExternalPrefLoader::NONE),
@@ skipping 13 matching lines @@
               service,
               connector->GetAppPackUpdater()->CreateExternalLoader(),
               Extension::EXTERNAL_PREF,
               Extension::INVALID,
               Extension::NO_FLAGS)));
   }
 #endif
 }
 
 }  // namespace extensions