Bind BrowserCdmManager callbacks to UI thread before passing to CDM.

Bind BrowserCdmManager callbacks to UI thread before passing to CDM.

R=xhwang@chromium.org
BUG=478808
Committed: https://crrev.com/5ffcbfc45f3ffff328a85025f1e61a76655b7a76
Cr-Commit-Position: refs/heads/master@{#325898}

[xhwang, 2015-04-20 18:21:12]

Thanks! LGTM with nit.

https://codereview.chromium.org/1099633003/diff/1/content/browser/media/cdm/b...
File content/browser/media/cdm/browser_cdm_manager.cc (right):

https://codereview.chromium.org/1099633003/diff/1/content/browser/media/cdm/b...
content/browser/media/cdm/browser_cdm_manager.cc:446: render_frame_id, cdm_id))
This will cause those callbacks to be posted always, even on Android where
everything lives on the UI thread. This is okay since the binded callbacks
aren't very frequent. Can you add a comment on why this is needed and note that
this will always cause a post?

[gunsch, 2015-04-20 18:38:43]

PTAL: moved to chromecast/

[xhwang, 2015-04-20 18:41:02]

LGTM! Thanks!

[gunsch, 2015-04-20 18:56:14]

The CQ bit was checked by gunsch@chromium.org

[commit-bot: I haz the power, 2015-04-20 18:57:16]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1099633003/40001

[commit-bot: I haz the power, 2015-04-20 20:25:54]

Committed patchset #3 (id:40001)

[commit-bot: I haz the power, 2015-04-20 20:26:40]

Patchset 3 (id:??) landed as
https://crrev.com/5ffcbfc45f3ffff328a85025f1e61a76655b7a76
Cr-Commit-Position: refs/heads/master@{#325898}