Remove non-monotonic clock support

webrtc/system_wrappers/system_wrappers.gyp

 # Copyright (c) 2012 The WebRTC project authors. All Rights Reserved.
 #
 # Use of this source code is governed by a BSD-style license
 # that can be found in the LICENSE file in the root of the source
 # tree. An additional intellectual property rights grant can be found
 # in the file PATENTS.  All contributing project authors may
 # be found in the AUTHORS file in the root of the source tree.
 
 {
   'includes': [ '../build/common.gypi', ],
@@ skipping 80 matching lines @@
       ],
       'conditions': [
         ['enable_data_logging==1', {
           'sources!': [ 'source/data_log_no_op.cc', ],
         }, {
           'sources!': [ 'source/data_log.cc', ],
         },],
         ['OS=="android"', {
           'defines': [
             'WEBRTC_THREAD_RR',
-            # TODO(leozwang): Investigate CLOCK_REALTIME and CLOCK_MONOTONIC
-            # support on Android. Keep WEBRTC_CLOCK_TYPE_REALTIME for now,
-            # remove it after I verify that CLOCK_MONOTONIC is fully functional
-            # with condition and event functions in system_wrappers.
-            'WEBRTC_CLOCK_TYPE_REALTIME',
            ],
           'conditions': [
             ['build_with_chromium==1', {
               'dependencies': [
                 'cpu_features_chromium.gyp:cpu_features_android',
               ],
             }, {
               'dependencies': [
                 'cpu_features_webrtc.gyp:cpu_features_android',
               ],
             }],
           ],
           'link_settings': {
             'libraries': [
               '-llog',
             ],
           },
         }, {  # OS!="android"
           'sources!': [
             'include/logcat_trace_context.h',
             'source/logcat_trace_context.cc',
           ],
         }],
         ['OS=="linux"', {
           'defines': [
             'WEBRTC_THREAD_RR',
-            # TODO(andrew): can we select this automatically?
-            # Define this if the Linux system does not support CLOCK_MONOTONIC.
-            #'WEBRTC_CLOCK_TYPE_REALTIME',
           ],
           'link_settings': {
             'libraries': [ '-lrt', ],
           },
         }],
         ['OS=="mac"', {
           'link_settings': {
             'libraries': [ '$(SDKROOT)/System/Library/Frameworks/ApplicationServices.framework', ],
           },
           'sources!': [
             'source/atomic32_posix.cc',
           ],
         }],
         ['OS=="ios" or OS=="mac"', {
           'defines': [
             'WEBRTC_THREAD_RR',
-            'WEBRTC_CLOCK_TYPE_REALTIME',
           ],
         }],
         ['OS=="win"', {
           'link_settings': {
             'libraries': [ '-lwinmm.lib', ],
           },
         }],
       ], # conditions
       'target_conditions': [
         # We need to do this in a target_conditions block to override the
@@ skipping 32 matching lines @@
       'type': 'static_library',
       'dependencies': [
         'system_wrappers',
         'field_trial_default',
         'metrics_default',
       ]
     },
   ], # targets
 }