Update decode/render fps stats when calling VideoReceiveStream::GetStats

Update decode/render fps stats when calling VideoReceiveStream::GetStats

If rate is only update on new frames, the measured rate cannot reach 0.

BUG=webrtc:7560
Review-Url: https://codereview.webrtc.org/2861663002
Cr-Commit-Position: refs/heads/master@{#18009}
Committed: https://chromium.googlesource.com/external/webrtc/+/948b27538d39bd38c7f9f999b546517fc892d2d1

[sprang_webrtc, 2017-05-03 14:08:57]

The CQ bit was checked by sprang@webrtc.org to run a CQ dry run

[commit-bot: I haz the power, 2017-05-03 14:09:09]

Dry run: CQ is trying da patch.

Follow status at:
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.webrtc.org/...

[sprang_webrtc, 2017-05-03 14:09:57]

sprang@webrtc.org changed reviewers:
+ asapersson@webrtc.org

[commit-bot: I haz the power, 2017-05-03 14:34:50]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2017-05-03 14:34:51]

Dry run: Try jobs failed on following builders:
  linux_msan on master.tryserver.webrtc (JOB_FAILED,
http://build.chromium.org/p/tryserver.webrtc/builders/linux_msan/builds/20172)

[åsapersson, 2017-05-04 09:33:37]

lgtm

[sprang_webrtc, 2017-05-04 09:39:34]

The CQ bit was checked by sprang@webrtc.org

[commit-bot: I haz the power, 2017-05-04 09:39:41]

CQ is trying da patch.

Follow status at:
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.webrtc.org/...

[commit-bot: I haz the power, 2017-05-04 09:47:13]

CQ is committing da patch.

Bot data: {"patchset_id": 20001, "attempt_start_ts": 1493890774676620,
"parent_rev": "61b22dde133aff91a0db6a628d87b2ea9134fa15", "commit_rev":
"948b27538d39bd38c7f9f999b546517fc892d2d1"}

[commit-bot: I haz the power, 2017-05-04 09:47:17]

Description was changed from

==========
Update decode/render fps stats when calling VideoReceiveStream::GetStats

If rate is only update on new frames, the measured rate cannot reach 0.

BUG=webrtc:7560
==========

to

==========
Update decode/render fps stats when calling VideoReceiveStream::GetStats

If rate is only update on new frames, the measured rate cannot reach 0.

BUG=webrtc:7560

Review-Url: https://codereview.webrtc.org/2861663002
Cr-Commit-Position: refs/heads/master@{#18009}
Committed:
https://chromium.googlesource.com/external/webrtc/+/948b27538d39bd38c7f9f999b...
==========

[commit-bot: I haz the power, 2017-05-04 09:47:18]

Committed patchset #2 (id:20001) as
https://chromium.googlesource.com/external/webrtc/+/948b27538d39bd38c7f9f999b...