Cleanup: Remove trailing whitespaces in gyp files.

google_apis/gcm/gcm.gyp

 # Copyright 2013 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 93 matching lines @@
         # Note: sources list duplicated in GN build.
         'base/fake_encryptor.cc',
         'base/fake_encryptor.h',
         'engine/fake_connection_factory.cc',
         'engine/fake_connection_factory.h',
         'engine/fake_connection_handler.cc',
         'engine/fake_connection_handler.h',
         'monitoring/fake_gcm_stats_recorder.cc',
         'monitoring/fake_gcm_stats_recorder.h',
       ],
-    },    
+    },
 
     # A standalone MCS (mobile connection server) client.
     {
       # GN version: //google_apis/gcm:mcs_probe
       'target_name': 'mcs_probe',
       'type': 'executable',
       'variables': { 'enable_wexit_time_destructors': 1, },
       'include_dirs': [
         '../..',
       ],
@@ skipping 43 matching lines @@
         'engine/gcm_store_impl_unittest.cc',
         'engine/gservices_settings_unittest.cc',
         'engine/heartbeat_manager_unittest.cc',
         'engine/mcs_client_unittest.cc',
         'engine/registration_request_unittest.cc',
         'engine/unregistration_request_unittest.cc',
       ]
     },
   ],
 }