Moved transport.h from webrtc/ to webrtc/api, created build target and updated dependencies.

webrtc/modules/rtp_rtcp/rtp_rtcp.gypi

 # Copyright (c) 2011 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.
 
 {
   'targets': [
     {
       'target_name': 'rtp_rtcp',
       'type': 'static_library',
       'dependencies': [
+        '<(webrtc_root)/api/api.gyp:transport_api',
         '<(webrtc_root)/common_video/common_video.gyp:common_video',
         '<(webrtc_root)/modules/modules.gyp:remote_bitrate_estimator',
         '<(webrtc_root)/system_wrappers/system_wrappers.gyp:system_wrappers',
       ],
       'sources': [
         # Common
         'include/fec_receiver.h',
         'include/flexfec_receiver.h',
         'include/receive_statistics.h',
         'include/remote_ntp_time_estimator.h',
@@ skipping 150 matching lines @@
               'defines': [ 'BWE_TEST_LOGGING_COMPILE_TIME_ENABLE=1' ],
             }, {
               'defines': [ 'BWE_TEST_LOGGING_COMPILE_TIME_ENABLE=0' ],
             }],
         ],
       # TODO(jschuh): Bug 1348: fix size_t to int truncations.
       'msvs_disabled_warnings': [ 4267, ],
     },
   ],
 }