Enable streamlined-apps flag on Chrome for Mac.

chrome/browser/about_flags.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/about_flags.h"
 
 #include <iterator>
 #include <map>
 #include <set>
 #include <utility>
@@ skipping 1507 matching lines @@
     IDS_FLAGS_ENABLE_FIRST_RUN_UI_TRANSITIONS_NAME,
     IDS_FLAGS_ENABLE_FIRST_RUN_UI_TRANSITIONS_DESCRIPTION,
     kOsCrOS,
     SINGLE_VALUE_TYPE(chromeos::switches::kEnableFirstRunUITransitions)
   },
 #endif
   {
     "enable-streamlined-hosted-apps",
     IDS_FLAGS_ENABLE_STREAMLINED_HOSTED_APPS_NAME,
     IDS_FLAGS_ENABLE_STREAMLINED_HOSTED_APPS_DESCRIPTION,
-    kOsWin | kOsCrOS | kOsLinux,
+    kOsWin | kOsCrOS | kOsLinux | kOsMac,
     SINGLE_VALUE_TYPE(switches::kEnableStreamlinedHostedApps)
   },
   {
     "enable-ephemeral-apps",
     IDS_FLAGS_ENABLE_EPHEMERAL_APPS_NAME,
     IDS_FLAGS_ENABLE_EPHEMERAL_APPS_DESCRIPTION,
     kOsAll,
     SINGLE_VALUE_TYPE(switches::kEnableEphemeralApps)
   },
   {
@@ skipping 1064 matching lines @@
 }
 
 const Experiment* GetExperiments(size_t* count) {
   *count = num_experiments;
   return experiments;
 }
 
 }  // namespace testing
 
 }  // namespace about_flags