tree 7b964e2f4f8f6fd392ec9824cc2e3c9e2244cd52
parent 3326d0ac8232d6e9f6cd696b63f88bd817b0ec62
author zhihuang <zhihuang@webrtc.org> 1478284695 -0700
committer Commit bot <commit-bot@chromium.org> 1478284699 +0000

Return false if PeerConnection::GetStats() is called on invalid tracks

Before calling StatsCollctor::GetStats() in PeerConnection::GetStats(), check if the track is valid. If not, return false.
A track is invalid if it is not a nullptr and there is no report data for it.

BUG=webrtc:6652

Review-Url: https://codereview.webrtc.org/2470023004
Cr-Commit-Position: refs/heads/master@{#14934}