Introduce a send time history class, keeping track of packet send times.

BUG=4308
R=stefan@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/39229004

Cr-Commit-Position: refs/heads/master@{#8546}
git-svn-id: http://webrtc.googlecode.com/svn/trunk@8546 4adac7df-926f-26a2-2b94-8c16560cd09d
diff --git a/webrtc/modules/modules.gyp b/webrtc/modules/modules.gyp
index 3a2f3e7..33ee5fd 100644
--- a/webrtc/modules/modules.gyp
+++ b/webrtc/modules/modules.gyp
@@ -188,6 +188,7 @@
             'bitrate_controller/bitrate_controller_unittest.cc',
             'bitrate_controller/remb_suppressor_unittest.cc',
             'bitrate_controller/send_side_bandwidth_estimation_unittest.cc',
+            'bitrate_controller/send_time_history_unittest.cc',
             'desktop_capture/desktop_and_cursor_composer_unittest.cc',
             'desktop_capture/desktop_region_unittest.cc',
             'desktop_capture/differ_block_unittest.cc',