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

chrome/chrome_common.gypi

 # Copyright (c) 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': {
     # File lists shared with GN build.
     'chrome_common_sources': [
       'common/all_messages.h',
       'common/attrition_experiments.h',
       'common/auto_start_linux.cc',
       'common/auto_start_linux.h',
+      'common/cast_messages.cc',
+      'common/cast_messages.h',
       'common/channel_info.cc',
       'common/channel_info.h',
       'common/channel_info_android.cc',
       'common/channel_info_chromeos.cc',
       'common/channel_info_mac.mm',
       'common/channel_info_posix.cc',
       'common/channel_info_win.cc',
       'common/child_process_logging.h',
       'common/child_process_logging_win.cc',
       'common/chrome_content_client.cc',
@@ skipping 630 matching lines @@
       'sources': [
         'common/resource_usage_reporter.mojom',
       ],
       'dependencies': [
         '../mojo/mojo_base.gyp:mojo_environment_chromium',
         '../third_party/mojo/mojo_public.gyp:mojo_cpp_bindings',
       ],
     },
   ],
 }