phoglund@
Could you please take a look?

https://build.chromium.org/p/chromium.win/builders/Win7%20Tests%20%28dbg%29%281%29/builds/50247

WebRtcGetUserMediaBrowserTest.GetUserMediaWithMandatorySourceID (run #1):
[ RUN      ] WebRtcGetUserMediaBrowserTest.GetUserMediaWithMandatorySourceID
[3732:4524:0630/192053:1810282:ERROR:singleton_hwnd.cc(34)] Cannot create windows on non-UI thread!
[2356:4680:0630/192053:1810641:INFO:CONSOLE(14)] "MediaStreamTrack.getSources is deprecated. See https://www.chromestatus.com/feature/4765305641369600 for more details.", source: http://127.0.0.1:53673/media/getusermedia.html (14)
[2356:4680:0630/192053:1810750:INFO:CONSOLE(32)] "Calling getUserMediaAndStop.", source: http://127.0.0.1:53673/media/getusermedia.html (32)
[2356:4680:0630/192053:1810781:INFO:CONSOLE(64)] "Looking at video in element local-view-1", source: http://127.0.0.1:53673/media/webrtc_test_utilities.js (64)
[2356:3092:0630/192053:1810828:ERROR:audio_manager_win.cc(464)] GetPreferredAudioParameters failed: 88890004
[2356:3092:0630/192053:1810844:ERROR:audio_manager_win.cc(464)] GetPreferredAudioParameters failed: 88890004
[2356:3092:0630/192053:1810844:ERROR:audio_manager_win.cc(464)] GetPreferredAudioParameters failed: 88890004
[2356:3092:0630/192053:1810844:ERROR:audio_output_resampler.cc(240)] Unable to open audio device in low latency mode.  Falling back to high latency audio output.
[2356:3092:0630/192053:1810844:ERROR:audio_output_resampler.cc(250)] Unable to open audio device in high latency mode.  Falling back to fake audio output.
[2356:1344:0630/192053:1811109:WARNING:video_capture_device_client.cc(142)] Failed to reserve I420 output buffer.
[2356:1344:0630/192054:1811171:WARNING:video_capture_device_client.cc(142)] Failed to reserve I420 output buffer.
[2356:1344:0630/192054:1811218:WARNING:video_capture_device_client.cc(142)] Failed to reserve I420 output buffer.
[2356:1344:0630/192054:1811265:WARNING:video_capture_device_client.cc(142)] Failed to reserve I420 output buffer.
[2356:1344:0630/192054:1811312:WARNING:video_capture_device_client.cc(142)] Failed to reserve I420 output buffer.
[2356:1344:0630/192054:1811358:WARNING:video_capture_device_client.cc(142)] Failed to reserve I420 output buffer.
[2356:1344:0630/192054:1811421:WARNING:video_capture_device_client.cc(142)] Failed to reserve I420 output buffer.
[2356:1344:0630/192054:1811483:WARNING:video_capture_device_client.cc(142)] Failed to reserve I420 output buffer.
[2356:1344:0630/192054:1811514:WARNING:video_capture_device_client.cc(142)] Failed to reserve I420 output buffer.
[2356:1344:0630/192054:1811561:WARNING:video_capture_device_client.cc(142)] Failed to reserve I420 output buffer.
[2356:1344:0630/192054:1811624:WARNING:video_capture_device_client.cc(142)] Failed to reserve I420 output buffer.
[2356:1344:0630/192054:1811670:WARNING:video_capture_device_client.cc(142)] Failed to reserve I420 output buffer.
[2356:1344:0630/192054:1811717:WARNING:video_capture_device_client.cc(142)] Failed to reserve I420 output buffer.
[2356:1344:0630/192054:1811764:WARNING:video_capture_device_client.cc(142)] Failed to reserve I420 output buffer.
[2356:1344:0630/192054:1811811:WARNING:video_capture_device_client.cc(142)] Failed to reserve I420 output buffer.
[2356:1344:0630/192054:1811858:WARNING:video_capture_device_client.cc(142)] Failed to reserve I420 output buffer.
[2356:1344:0630/192054:1811951:WARNING:video_capture_device_client.cc(142)] Failed to reserve I420 output buffer.
[2356:1344:0630/192054:1811967:WARNING:video_capture_device_client.cc(142)] Failed to reserve I420 output buffer.
[2356:1344:0630/192054:1812014:WARNING:video_capture_device_client.cc(142)] Failed to reserve I420 output buffer.
[2356:1344:0630/192054:1812060:WARNING:video_capture_device_client.cc(142)] Failed to reserve I420 output buffer.
[2356:1344:0630/192054:1812107:WARNING:video_capture_device_client.cc(142)] Failed to reserve I420 output buffer.
[2356:1344:0630/192055:1812170:WARNING:video_capture_device_client.cc(142)] Failed to reserve I420 output buffer.
[2356:1344:0630/192055:1812216:WARNING:video_capture_device_client.cc(142)] Failed to reserve I420 output buffer.
[2356:1344:0630/192055:1812294:WARNING:video_capture_device_client.cc(142)] Failed to reserve I420 output buffer.
[2356:1344:0630/192055:1812326:WARNING:video_capture_device_client.cc(142)] Failed to reserve I420 output buffer.
[2356:1344:0630/192055:1812372:WARNING:video_capture_device_client.cc(142)] Failed to reserve I420 output buffer.
[2356:1344:0630/192055:1812419:WARNING:video_capture_device_client.cc(142)] Failed to reserve I420 output buffer.
[2356:1344:0630/192055:1812466:WARNING:video_capture_device_client.cc(142)] Failed to reserve I420 output buffer.
[2356:1344:0630/192055:1812513:WARNING:video_capture_device_client.cc(142)] Failed to reserve I420 output buffer.
[2356:1344:0630/192055:1812560:WARNING:video_capture_device_client.cc(142)] Failed to reserve I420 output buffer.
[2356:1344:0630/192055:1812622:WARNING:video_capture_device_client.cc(142)] Failed to reserve I420 output buffer.
[2356:1344:0630/192055:1812669:WARNING:video_capture_device_client.cc(142)] Failed to reserve I420 output buffer.
[2356:4680:0630/192055:1812669:ERROR:navigation_entry_screenshot_manager.cc(141)] Invalid entry with unique id: 1
[2356:1344:0630/192055:1812716:WARNING:video_capture_device_client.cc(142)] Failed to reserve I420 output buffer.
[2356:1344:0630/192055:1812762:WARNING:video_capture_device_client.cc(142)] Failed to reserve I420 output buffer.
[2356:1344:0630/192055:1812825:WARNING:video_capture_device_client.cc(142)] Failed to reserve I420 output buffer.
[2356:1344:0630/192055:1812872:WARNING:video_capture_device_client.cc(142)] Failed to reserve I420 output buffer.
[2356:1344:0630/192055:1812918:WARNING:video_capture_device_client.cc(142)] Failed to reserve I420 output buffer.
[2356:1344:0630/192055:1812965:WARNING:video_capture_device_client.cc(142)] Failed to reserve I420 output buffer.
[2356:1344:0630/192055:1813012:WARNING:video_capture_device_client.cc(142)] Failed to reserve I420 output buffer.
[2356:1344:0630/192055:1813059:WARNING:video_capture_device_client.cc(142)] Failed to reserve I420 output buffer.
[2356:1344:0630/192055:1813121:WARNING:video_capture_device_client.cc(142)] Failed to reserve I420 output buffer.
[2356:1344:0630/192056:1813168:WARNING:video_capture_device_client.cc(142)] Failed to reserve I420 output buffer.
[2356:1344:0630/192056:1813215:WARNING:video_capture_device_client.cc(142)] Failed to reserve I420 output buffer.
[2356:1344:0630/192056:1813262:WARNING:video_capture_device_client.cc(142)] Failed to reserve I420 output buffer.
[2356:1344:0630/192056:1813308:WARNING:video_capture_device_client.cc(142)] Failed to reserve I420 output buffer.
[2356:1344:0630/192056:1813371:WARNING:video_capture_device_client.cc(142)] Failed to reserve I420 output buffer.
[2356:1344:0630/192056:1813418:WARNING:video_capture_device_client.cc(142)] Failed to reserve I420 output buffer.
[2356:1344:0630/192056:1813464:WARNING:video_capture_device_client.cc(142)] Failed to reserve I420 output buffer.
[2356:1344:0630/192056:1813511:WARNING:video_capture_device_client.cc(142)] Failed to reserve I420 output buffer.
[2356:1344:0630/192056:1813558:WARNING:video_capture_device_client.cc(142)] Failed to reserve I420 output buffer.
[2356:1344:0630/192056:1813620:WARNING:video_capture_device_client.cc(142)] Failed to reserve I420 output buffer.
[2356:1344:0630/192056:1813667:WARNING:video_capture_device_client.cc(142)] Failed to reserve I420 output buffer.
[2356:1344:0630/192056:1813714:WARNING:video_capture_device_client.cc(142)] Failed to reserve I420 output buffer.
[2356:1344:0630/192056:1813870:WARNING:video_capture_device_client.cc(142)] Failed to reserve I420 output buffer.
[2356:1344:0630/192056:1813917:WARNING:video_capture_device_client.cc(142)] Failed to reserve I420 output buffer.
[2356:1344:0630/192056:1813964:WARNING:video_capture_device_client.cc(142)] Failed to reserve I420 output buffer.
[2356:1344:0630/192056:1814010:WARNING:video_capture_device_client.cc(142)] Failed to reserve I420 output buffer.
[2356:1344:0630/192056:1814057:WARNING:video_capture_device_client.cc(142)] Failed to reserve I420 output buffer.
[2356:1344:0630/192056:1814120:WARNING:video_capture_device_client.cc(142)] Failed to reserve I420 output buffer.
[2356:1344:0630/192057:1814166:WARNING:video_capture_device_client.cc(142)] Failed to reserve I420 output buffer.
[2356:1344:0630/192057:1814229:WARNING:video_capture_device_client.cc(142)] Failed to reserve I420 output buffer.
[2356:1344:0630/192057:1814260:WARNING:video_capture_device_client.cc(142)] Failed to reserve I420 output buffer.
[2356:1344:0630/192057:1814322:WARNING:video_capture_device_client.cc(142)] Failed to reserve I420 output buffer.
[2356:1344:0630/192057:1814369:WARNING:video_capture_device_client.cc(142)] Failed to reserve I420 output buffer.
[2356:1344:0630/192057:1814416:WARNING:video_capture_device_client.cc(142)] Failed to reserve I420 output buffer.
[2356:4680:0630/192057:1814416:INFO:CONSOLE(87)] "Done looking at video in element local-view-1", source: http://127.0.0.1:53673/media/webrtc_test_utilities.js (87)
[2356:4680:0630/192057:1814416:INFO:CONSOLE(88)] "DEBUG: video.width = 640", source: http://127.0.0.1:53673/media/webrtc_test_utilities.js (88)
[2356:4680:0630/192057:1814416:INFO:CONSOLE(89)] "DEBUG: video.height = 480", source: http://127.0.0.1:53673/media/webrtc_test_utilities.js (89)
[2356:4680:0630/192057:1814416:INFO:CONSOLE(64)] "Looking at video in element local-view-1", source: http://127.0.0.1:53673/media/webrtc_test_utilities.js (64)
[2356:4680:0630/192057:1814416:INFO:CONSOLE(97)] "Still waiting for video to satisfy function isVideoPlaying(pixels, previousPixels) {
  for (var i = 0; i < pixels.length; i++) {
    if (pixels[i] != previousPixels[i]) {
      return true;
    }
  }
  return false;
}", source: http://127.0.0.1:53673/media/webrtc_test_utilities.js (97)
[2356:4680:0630/192057:1814432:INFO:CONSOLE(98)] "DEBUG: video.width = 640", source: http://127.0.0.1:53673/media/webrtc_test_utilities.js (98)
[2356:4680:0630/192057:1814432:INFO:CONSOLE(99)] "DEBUG: video.height = 480", source: http://127.0.0.1:53673/media/webrtc_test_utilities.js (99)
[2356:4680:0630/192058:1815290:INFO:CONSOLE(87)] "Done looking at video in element local-view-1", source: http://127.0.0.1:53673/media/webrtc_test_utilities.js (87)
[2356:4680:0630/192058:1815290:INFO:CONSOLE(88)] "DEBUG: video.width = 640", source: http://127.0.0.1:53673/media/webrtc_test_utilities.js (88)
[2356:4680:0630/192058:1815290:INFO:CONSOLE(89)] "DEBUG: video.height = 480", source: http://127.0.0.1:53673/media/webrtc_test_utilities.js (89)
[2356:3092:0630/192103:1820906:WARNING:audio_input_sync_writer.cc(241)] AISW: No room in fifo.
[2356:3092:0630/192103:1820937:WARNING:audio_input_sync_writer.cc(241)] AISW: No room in fifo.
[2356:3092:0630/192103:1820968:WARNING:audio_input_sync_writer.cc(241)] AISW: No room in fifo.
[2356:3092:0630/192103:1820999:WARNING:audio_input_sync_writer.cc(241)] AISW: No room in fifo.
[2356:3092:0630/192103:1821015:WARNING:audio_input_sync_writer.cc(241)] AISW: No room in fifo.
[2356:3092:0630/192103:1821030:WARNING:audio_input_sync_writer.cc(241)] AISW: No room in fifo.
[2356:3092:0630/192103:1821140:WARNING:audio_input_sync_writer.cc(241)] AISW: No room in fifo.
[2356:3092:0630/192104:1821249:WARNING:audio_input_sync_writer.cc(241)] AISW: No room in fifo.
[2356:3092:0630/192104:1821389:WARNING:audio_input_sync_writer.cc(241)] AISW: No room in fifo.
[2356:3092:0630/192104:1821530:WARNING:audio_input_sync_writer.cc(241)] AISW: No room in fifo.
[2356:3092:0630/192104:1821623:WARNING:audio_input_sync_writer.cc(241)] AISW: No room in fifo.
[2356:3092:0630/192104:1821654:WARNING:audio_input_sync_writer.cc(241)] AISW: No room in fifo.
[2356:3092:0630/192104:1821732:WARNING:audio_input_sync_writer.cc(241)] AISW: No room in fifo.
[2356:3092:0630/192104:1821857:WARNING:audio_input_sync_writer.cc(241)] AISW: No room in fifo.
[2356:3092:0630/192104:1822029:WARNING:audio_input_sync_writer.cc(241)] AISW: No room in fifo.
[2356:3092:0630/192105:1822169:WARNING:audio_input_sync_writer.cc(241)] AISW: No room in fifo.
[2356:3092:0630/192105:1822341:WARNING:audio_input_sync_writer.cc(241)] AISW: No room in fifo.
[2356:3092:0630/192105:1822497:WARNING:audio_input_sync_writer.cc(241)] AISW: No room in fifo.
[2356:3092:0630/192105:1822575:WARNING:audio_input_sync_writer.cc(241)] AISW: No room in fifo.
[2356:3092:0630/192105:1822606:WARNING:audio_input_sync_writer.cc(241)] AISW: No room in fifo.
[2356:3092:0630/192105:1822637:WARNING:audio_input_sync_writer.cc(241)] AISW: No room in fifo.
[2356:3092:0630/192105:1822653:WARNING:audio_input_sync_writer.cc(241)] AISW: No room in fifo.
[2356:3092:0630/192105:1822684:WARNING:audio_input_sync_writer.cc(241)] AISW: No room in fifo.
[2356:3092:0630/192105:1822700:WARNING:audio_input_sync_writer.cc(241)] AISW: No room in fifo.
[2356:3092:0630/192105:1822731:WARNING:audio_input_sync_writer.cc(241)] AISW: No room in fifo.
[2356:3092:0630/192105:1822746:WARNING:audio_input_sync_writer.cc(241)] AISW: No room in fifo.
[2356:3092:0630/192105:1822778:WARNING:audio_input_sync_writer.cc(241)] AISW: No room in fifo.
[2356:3092:0630/192105:1822793:WARNING:audio_input_sync_writer.cc(241)] AISW: No room in fifo.
[2356:3092:0630/192105:1822824:WARNING:audio_input_sync_writer.cc(241)] AISW: No room in fifo.
[2356:3092:0630/192105:1822840:WARNING:audio_input_sync_writer.cc(241)] AISW: No room in fifo.
[2356:3092:0630/192105:1822856:WARNING:audio_input_sync_writer.cc(241)] AISW: No room in fifo.
[2356:3092:0630/192105:1822887:WARNING:audio_input_sync_writer.cc(241)] AISW: No room in fifo.
[2356:3092:0630/192105:1822918:WARNING:audio_input_sync_writer.cc(241)] AISW: No room in fifo.
[2356:3092:0630/192105:1822949:WARNING:audio_input_sync_writer.cc(241)] AISW: No room in fifo.
[2356:3092:0630/192105:1822965:WARNING:audio_input_sync_writer.cc(241)] AISW: No room in fifo.
[2356:3092:0630/192105:1822980:WARNING:audio_input_sync_writer.cc(241)] AISW: No room in fifo.
[2356:3092:0630/192105:1823012:WARNING:audio_input_sync_writer.cc(241)] AISW: No room in fifo.
[2356:3092:0630/192105:1823027:WARNING:audio_input_sync_writer.cc(241)] AISW: No room in fifo.
[2356:3092:0630/192105:1823058:WARNING:audio_input_sync_writer.cc(241)] AISW: No room in fifo.
[2356:3092:0630/192105:1823090:WARNING:audio_input_sync_writer.cc(241)] AISW: No room in fifo.
[2356:3092:0630/192105:1823105:WARNING:audio_input_sync_writer.cc(241)] AISW: No room in fifo.
[2356:3092:0630/192105:1823136:WARNING:audio_input_sync_writer.cc(241)] AISW: No room in fifo.
[2356:3092:0630/192106:1823168:WARNING:audio_input_sync_writer.cc(241)] AISW: No room in fifo.
[2356:3092:0630/192106:1823292:WARNING:audio_input_sync_writer.cc(241)] AISW: No room in fifo.
[2356:3092:0630/192106:1823417:WARNING:audio_input_sync_writer.cc(241)] AISW: No room in fifo.
[2356:3092:0630/192106:1823511:WARNING:audio_input_sync_writer.cc(241)] AISW: No room in fifo.
[2356:3092:0630/192106:1823651:WARNING:audio_input_sync_writer.cc(241)] AISW: No room in fifo.
[2356:3092:0630/192106:1823729:WARNING:audio_input_sync_writer.cc(241)] AISW: No room in fifo.
[2356:3092:0630/192106:1823776:WARNING:audio_input_sync_writer.cc(241)] AISW: No room in fifo.
[2356:3092:0630/192106:1823916:WARNING:audio_input_sync_writer.cc(241)] AISW: No room in fifo.
[2356:3092:0630/192106:1824088:WARNING:audio_input_sync_writer.cc(241)] AISW: No room in fifo.
[2356:3092:0630/192106:1824088:WARNING:audio_input_sync_writer.cc(246)] AISW: Log cap reached, suppressing further fifo overflow logs.
[2356:4680:0630/192134:1852153:INFO:user_input_monitor_win.cc(171)] RegisterRawInputDevices() failed for RIDEV_REMOVE: The parameter is incorrect. (0x57)
[2356:4680:0630/192135:1853135:INFO:CONSOLE(32)] "Calling getUserMediaAndStop.", source: http://127.0.0.1:53673/media/getusermedia.html (32)
[2356:4680:0630/192136:1853167:INFO:CONSOLE(64)] "Looking at video in element local-view-1", source: http://127.0.0.1:53673/media/webrtc_test_utilities.js (64)
[2356:3092:0630/192136:1853213:ERROR:audio_manager_win.cc(464)] GetPreferredAudioParameters failed: 88890004
[2356:3092:0630/192136:1853213:ERROR:audio_manager_win.cc(464)] GetPreferredAudioParameters failed: 88890004
[2356:3092:0630/192136:1853213:ERROR:audio_manager_win.cc(464)] GetPreferredAudioParameters failed: 88890004
[2356:4680:0630/192136:1853416:ERROR:navigation_entry_screenshot_manager.cc(141)] Invalid entry with unique id: 3
[2356:1344:0630/192136:1853510:WARNING:video_capture_device_client.cc(142)] Failed to reserve I420 output buffer.
[2356:1344:0630/192136:1853557:WARNING:video_capture_device_client.cc(142)] Failed to reserve I420 output buffer.
[2356:1344:0630/192136:1853603:WARNING:video_capture_device_client.cc(142)] Failed to reserve I420 output buffer.
[2356:1344:0630/192136:1853650:WARNING:video_capture_device_client.cc(142)] Failed to reserve I420 output buffer.
[2356:1344:0630/192136:1853713:WARNING:video_capture_device_client.cc(142)] Failed to reserve I420 output buffer.
[2356:1344:0630/192136:1853759:WARNING:video_capture_device_client.cc(142)] Failed to reserve I420 output buffer.
[2356:1344:0630/192136:1853853:WARNING:video_capture_device_client.cc(142)] Failed to reserve I420 output buffer.
[2356:1344:0630/192136:1853869:WARNING:video_capture_device_client.cc(142)] Failed to reserve I420 output buffer.

Appears this flaked once here: https://build.chromium.org/p/chromium.win/builders/Win7%20Tests%20%28dbg%29%281%29/builds/50269

Per, can you take a look?

Loooks like something is making the test run very slow. 
"Failed to reserve I420 output buffer" means that a captured frame has been captured in the browser process but the render process has not yet returned previously captured frames.

 Issue 625002  has been merged into this issue.

 Issue 624884  has been merged into this issue.

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/5225533743d7b722480e20fe5e2627fd04893dea

commit 5225533743d7b722480e20fe5e2627fd04893dea
Author: perkj <perkj@chromium.org>
Date: Wed Jul 06 14:22:40 2016

Restructure and add logs to WebRtcGetUserMediaBrowserTest.GetUserMediaWithMandatorySourceID

BUG= 625024 , 622085 

Review-Url: https://codereview.chromium.org/2122153002
Cr-Commit-Position: refs/heads/master@{#403903}

[modify] https://crrev.com/5225533743d7b722480e20fe5e2627fd04893dea/content/browser/media/webrtc/webrtc_getusermedia_browsertest.cc
[modify] https://crrev.com/5225533743d7b722480e20fe5e2627fd04893dea/content/test/data/media/getusermedia.html
[modify] https://crrev.com/5225533743d7b722480e20fe5e2627fd04893dea/content/test/data/media/webrtc_test_utilities.js

no flakes the last couple of days as far as I can see. Closing.