Update encoder settings periodically, not only on new bandwidth estimate

Update encoder settings periodically, not only on new bandwidth estimate

Also moved actual update call to encoder thread, and tweaked frame rate
estimate to be less noisy.

This is a re-upload of https://review.webrtc.org/47249004

BUG=chromium:476469
R=stefan@webrtc.org

Committed: https://chromium.googlesource.com/external/webrtc/+/66a641a9c67333a344563bf0ee88e6db7ca26fba

[sprang_webrtc, 2015-06-11 11:23:32]

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

[sprang_webrtc, 2015-06-11 11:23:32]

Re-upload, please re-lgtm!

[stefan-webrtc, 2015-06-11 11:50:57]

lgtm

[sprang_webrtc, 2015-06-11 12:20:23]

Committed patchset #1 (id:1) manually as
66a641a9c67333a344563bf0ee88e6db7ca26fba (presubmit successful).

[mflodman, 2015-06-21 19:01:51]

mflodman@webrtc.org changed reviewers:
+ mflodman@webrtc.org

[mflodman, 2015-06-21 19:01:52]

Why was this re-uploaded?

LGTM still, just wondering :)

[sprang_webrtc, 2015-06-22 07:50:20]

On 2015/06/21 19:01:52, mflodman wrote:
> Why was this re-uploaded?
> 
> LGTM still, just wondering :)

Rietveld change... Had trouble running try-jobs.

[mflodman, 2015-06-22 08:14:47]

On 2015/06/22 07:50:20, språng wrote:
> On 2015/06/21 19:01:52, mflodman wrote:
> > Why was this re-uploaded?
> > 
> > LGTM still, just wondering :)
> 
> Rietveld change... Had trouble running try-jobs.

Ah!

Can you close the old CL to get it out of the review lists?