Replace uses of raw uint32's with a type-checked RtpTimeTicks data type.

media/cast/cast.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': {
     'include_tests%': 1,
     'chromium_code': 1,
   },
   'conditions': [
@@ skipping 20 matching lines @@
         'cast_logging_proto',
       ],
       'sources': [
         'cast_config.cc',
         'cast_config.h',
         'cast_defines.h',
         'cast_environment.cc',
         'cast_environment.h',
         'common/clock_drift_smoother.cc',
         'common/clock_drift_smoother.h',
+        'common/expanded_value_base.h',
+        'common/rtp_time.cc',
+        'common/rtp_time.h',
         'common/transport_encryption_handler.cc',
         'common/transport_encryption_handler.h',
         'constants.h',
         'logging/encoding_event_subscriber.cc',
         'logging/encoding_event_subscriber.h',
         'logging/log_deserializer.cc',
         'logging/log_deserializer.h',
         'logging/log_event_dispatcher.cc',
         'logging/log_event_dispatcher.h',
         'logging/log_serializer.cc',
@@ skipping 203 matching lines @@
         'net/rtp/rtp_parser.cc',
         'net/rtp/rtp_parser.h',
         'net/rtp/rtp_sender.cc',
         'net/rtp/rtp_sender.h',
         'net/udp_transport.cc',
         'net/udp_transport.h',
       ], # sources
     },
   ],
 }