Revert of Move DefaultActivationClient to wm/core

ui/snapshot/snapshot.gyp

 # 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.
 
 {
   'variables': {
     'chromium_code': 1,
   },
   'targets': [
     {
@@ skipping 50 matching lines @@
         'snapshot_mac_unittest.mm',
         'test/run_all_unittests.cc',
       ],
       'conditions': [
         ['use_aura==1', {
           'dependencies': [
             '../../base/base.gyp:test_support_base',
             '../aura/aura.gyp:aura_test_support',
             '../compositor/compositor.gyp:compositor',
             '../compositor/compositor.gyp:compositor_test_support',
-            '../wm/wm.gyp:wm',
           ],
         }],
         # See http://crbug.com/162998#c4 for why this is needed.
         # TODO(dmikurube): Kill linux_use_tcmalloc. http://crbug.com/345554
         ['OS=="linux" and ((use_allocator!="none" and use_allocator!="see_use_tcmalloc") or (use_allocator=="see_use_tcmalloc" and linux_use_tcmalloc==1))', {
           'dependencies': [
             '../../base/allocator/allocator.gyp:allocator',
           ],
         }],
       ],
@@ skipping 13 matching lines @@
             'snapshot',
           ],
           'include_dirs': [
             '../..',
           ],
         },
       ],
     }],
   ],
 }