Reland 1: "mac: Allow Chrome to hand off its active URL to other devices."

components/handoff.gypi

 # Copyright 2014 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.
 
 {
   'targets': [
     {
       # GN version: //components/handoff
       'target_name': 'handoff',
       'type': 'static_library',
       'include_dirs': [
         '..',
       ],
       'conditions': [
         ['OS=="mac" or OS=="ios"', {
           'sources': [
             'handoff/handoff_utility.h',
             'handoff/handoff_utility.mm',
           ],
         }],
+        ['OS=="mac"', {
+          'sources': [
+            'handoff/handoff_manager.h',
+            'handoff/handoff_manager.mm',
+          ],
+          'dependencies': [
+            '../base/base.gyp:base',
+          ],
+        }],
       ],
     },
   ],
 }