Enable MessageLoop unittests on iOS and fix MessagePumpIOForIOS bug.

base/base.gypi

 # 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.
 
 {
   'target_defaults': {
     'variables': {
       'base_target': 0,
     },
     'target_conditions': [
@@ skipping 624 matching lines @@
               ['include', '^message_pump_mac\\.'],
               ['include', '^threading/platform_thread_mac\\.'],
               ['include', '^sys_string_conversions_mac\\.'],
               ['include', '^time_mac\\.'],
               ['include', '^worker_pool_mac\\.'],
               # Exclude all process_util except the minimal implementation
               # needed on iOS (mostly for unit tests).
               ['exclude', '^process_util'],
               ['include', '^process_util_ios\\.mm$'],
             ],
+            'sources!': [
+              'message_pump_libevent.cc'
+            ],
           }],
           ['OS != "mac" or >(nacl_untrusted_build)==1', {
               'sources!': [
                 'mac/scoped_aedesc.h'
               ],
           }],
           # For now, just test the *BSD platforms enough to exclude them.
           # Subsequent changes will include them further.
           ['OS != "freebsd" or >(nacl_untrusted_build)==1', {
               'sources/': [ ['exclude', '_freebsd\\.cc$'] ],
@@ skipping 59 matching lines @@
           # Remove all unnecessary files for build_nexe.py to avoid exceeding
           # command-line-string limitation when building NaCl on Windows.
           ['OS == "win" and >(nacl_untrusted_build)==1', {
               'sources/': [ ['exclude', '\\.h$'] ],
           }],
         ],
       }],
     ],
   },
 }