Findit identified the culprit r558914 with confidence 70.0% in the config "chromium.memory / Linux ChromiumOS MSan Tests"
based on the flakiness trend:

https://findit-for-me.appspot.com/waterfall/flake?key=ag9zfmZpbmRpdC1mb3ItbWVy1QELEhdNYXN0ZXJGbGFrZUFuYWx5c2lzUm9vdCKeAWNocm9taXVtLm1lbW9yeS9MaW51eCBDaHJvbWl1bU9TIE1TYW4gVGVzdHMvNzE3NS9jb250ZW50X2Jyb3dzZXJ0ZXN0cy9WMlZpVW5SalIyVjBWWE5sY2sxbFpHbGhRbkp2ZDNObGNsUmxjM1F1VTNKalQySnFaV04wVW1WdGIzWmxSbWx5YzNSUFpsUjNiMVpwWkdWdlZISmhZMnR6DAsSE01hc3RlckZsYWtlQW5hbHlzaXMYAQw


Automatically posted by the findit-for-me app (https://goo.gl/Ot9f7N).
Feedback is welcome! Please use component Tools>Test>FindIt>Flakiness

Can you take a look, or reassign to someone more appropriate?

Doesn't seem related to my change. Assigning to guidou@ who might know more about this.

The actual error is:

From javascript: Error: expected '301', got '300'.
    at failTest (http://127.0.0.1:42847/media/webrtc_test_utilities.js:30:17)
    at assertEquals (http://127.0.0.1:42847/media/webrtc_test_utilities.js:168:5)
    at HTMLVideoElement.video.onprogress (http://127.0.0.1:42847/media/getusermedia.html:608:13).

Disabled tests.

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/ecd9ac62caf3e846b6aa22d4cf1843565c4c3d7a

commit ecd9ac62caf3e846b6aa22d4cf1843565c4c3d7a
Author: Guido Urdaneta <guidou@chromium.org>
Date: Fri May 18 09:41:35 2018

Disable flaky WebRtcGetUserMediaBrowserTest.SrcObjectRemoveFirstOfTwoVideoTracks

This is flaking with Leak and Memory Sanitizers.

TBR=hbos@chromium.org

Bug: 843844
Change-Id: Ide654e740b76e92d63a64850def3bd1e654411f4
Reviewed-on: https://chromium-review.googlesource.com/1065850
Reviewed-by: Guido Urdaneta <guidou@chromium.org>
Reviewed-by: Henrik Boström <hbos@chromium.org>
Commit-Queue: Guido Urdaneta <guidou@chromium.org>
Cr-Commit-Position: refs/heads/master@{#559847}
[modify] https://crrev.com/ecd9ac62caf3e846b6aa22d4cf1843565c4c3d7a/content/browser/webrtc/webrtc_getusermedia_browsertest.cc

 Issue 847055  has been merged into this issue.

 Issue 846741  has been merged into this issue.

 Issue 846984  has been merged into this issue.

 Issue 846960  has been merged into this issue.

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/577963aecb20afb7be442fe782d9508b0a9b075e

commit 577963aecb20afb7be442fe782d9508b0a9b075e
Author: Trent Apted <tapted@chromium.org>
Date: Mon May 28 02:33:48 2018

Widen/disable some WebRtcGetUserMediaBrowserTest tests for flakiness

Affected:
 WebRtcGetUserMediaBrowserTest.SrcObjectRemoveFirstOfTwoVideoTracks
 WebRtcGetUserMediaBrowserTest.TwoGetUserMediaWithEqualConstraints
 WebRtcGetUserMediaBrowserTest.TwoGetUserMediaWithFirstHdSecondVga
 WebRtcGetUserMediaBrowserTest.TwoGetUserMediaAndCheckCallbackAfterFailure

It's flaky on more than just asan.

TBR=guidou@chromium.org

Bug: 843844,  847055 ,  846741 ,  846984 ,  846960 
Change-Id: I6edb91ee741a5e57a950f98e23926f5b96515a01
Reviewed-on: https://chromium-review.googlesource.com/1074774
Commit-Queue: Trent Apted <tapted@chromium.org>
Reviewed-by: Trent Apted <tapted@chromium.org>
Cr-Commit-Position: refs/heads/master@{#562165}
[modify] https://crrev.com/577963aecb20afb7be442fe782d9508b0a9b075e/content/browser/webrtc/webrtc_getusermedia_browsertest.cc

[ RUN      ] WebRtcGetUserMediaBrowserTest.TwoGetUserMediaWithSecondVideoCropped/1
DevTools listening on ws://127.0.0.1:54613/devtools/browser/3a7f1f96-47f6-4d4b-bf52-8f9e43cd4b24
[4164:4240:0604/234213.473:INFO:media_foundation_video_encode_accelerator_win.cc(353)] Windows versions earlier than 8 are not supported.
../../content/browser/webrtc/webrtc_getusermedia_browsertest.cc(133): error: Expected equality of these values:
  expected_result
    Which is: "w=640:h=480-w=640:h=360"
  ExecuteJavascriptAndReturnResult(command)
    Which is: "Error: VideoElement width and height set to 0.\n    at failTest (http://127.0.0.1:54614/media/webrtc_test_utilities.js:30:17)\n    at detectorFunction (http://127.0.0.1:54614/media/getusermedia.html:402:9)"
With diff:
@@ -1,1 +1,3 @@
-w=640:h=480-w=640:h=360
+Error: VideoElement width and height set to 0.
+    at failTest (http://127.0.0.1:54614/media/webrtc_test_utilities.js:30:17)
+    at detectorFunction (http://127.0.0.1:54614/media/getusermedia.html:402:9)
Stack trace:
Backtrace:
	StackTraceGetter::CurrentStackTrace [0x0187038A+90]
	testing::internal::UnitTestImpl::CurrentOsStackTraceExceptTop [0x01887B4A+74]
	testing::internal::AssertHelper::operator= [0x0188765B+75]
	content::WebRtcGetUserMediaBrowserTest::RunTwoGetTwoGetUserMediaWithDifferentContraints [0x013B39E9+953]
	content::WebRtcGetUserMediaBrowserTest_TwoGetUserMediaWithSecondVideoCropped_Test::RunTestOnMainThread [0x013B3BCA+122]
	content::BrowserTestBase::ProxyRunTestOnMainThreadLoop [0x02880054+804]
	??$Invoke@P8BrowserTestBase@content@@AEXXZPAV12@$$V@?$FunctorTraits@P8BrowserTestBase@content@@AEXXZX@internal@base@@SAXP8BrowserTestBase@content@@AEXXZ$$QAPAV34@@Z [0x0288231C+28]
	base::internal::InvokeHelper<0,void>::MakeItSo<void (__thiscall content::BrowserTestBase::*const &)(void),content::BrowserTestBase *> [0x0288225F+79]
	base::internal::Invoker<base::internal::BindState<void (__thiscall content::BrowserTestBase::*)(void),base::internal::UnretainedWrapper<content::BrowserTestBase> >,void __cdecl(void)>::RunImpl<void (__thiscall content::BrowserTestBase::*const &)(void),std [0x028821F5+85]
	base::internal::Invoker<base::internal::BindState<void (__thiscall content::BrowserTestBase::*)(void),base::internal::UnretainedWrapper<content::BrowserTestBase> >,void __cdecl(void)>::Run [0x028820EF+63]
	base::RepeatingCallback<void __cdecl(void)>::Run [0x00B17AA2+50]
	content::ShellBrowserMainParts::PreMainMessageLoopRun [0x02B928D5+101]
	content::BrowserMainLoop::PreMainMessageLoopRun [0x61C59406+342]
	??$Invoke@P8BrowserMainLoop@content@@AEHXZPAV12@$$V@?$FunctorTraits@P8BrowserMainLoop@content@@AEHXZX@internal@base@@SAHP8BrowserMainLoop@content@@AEHXZ$$QAPAV34@@Z [0x61C6351C+28]
	base::internal::InvokeHelper<0,int>::MakeItSo<int (__thiscall content::BrowserMainLoop::*const &)(void),content::BrowserMainLoop *> [0x61C6344F+79]
	base::internal::Invoker<base::internal::BindState<int (__thiscall content::BrowserMainLoop::*)(void),base::internal::UnretainedWrapper<content::BrowserMainLoop> >,int __cdecl(void)>::RunImpl<int (__thiscall content::BrowserMainLoop::*const &)(void),std::t [0x61C633E5+85]
	base::internal::Invoker<base::internal::BindState<int (__thiscall content::BrowserMainLoop::*)(void),base::internal::UnretainedWrapper<content::BrowserMainLoop> >,int __cdecl(void)>::Run [0x61C6329F+63]
	base::RepeatingCallback<int __cdecl(void)>::Run [0x625A2BA2+50]
	content::StartupTaskRunner::RunAllTasksNow [0x62ED7699+137]
	content::BrowserMainLoop::CreateStartupTasks [0x61C57105+1493]
	content::BrowserMainRunnerImpl::Initialize [0x61C6949F+1983]
	content::BrowserMainRunnerImpl::Initialize [0x61C68CBD+93]
	ShellBrowserMain [0x032115A8+72]
	content::ShellMainDelegate::RunProcess [0x032095DC+300]
	content::RunBrowserProcessMain [0x644E3596+134]
	content::ContentMainRunnerImpl::Run [0x644E494A+618]
	content::ContentServiceManagerMainDelegate::RunEmbedderProcess [0x644E0F11+33]
	service_manager::Main [0x5F2C372A+1418]
	content::ContentMain [0x644E348C+92]
	content::BrowserTestBase::SetUp [0x0287F901+2913]
	content::ContentBrowserTest::SetUp [0x0285A467+135]
	content::WebRtcContentBrowserTestBase::SetUp [0x013A9282+34]
[4164:4240:0604/234214.351:WARNING:ipc_message_attachment_set.cc(49)] MessageAttachmentSet destroyed with unconsumed attachments: 0/1
[3980:388:0604/234215.744:WARNING:discardable_shared_memory_manager.cc(431)] Some MojoDiscardableSharedMemoryManagerImpls are still alive. They will be leaked.

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/b95153e1e486df3cd0603d2300e1d55656dcd4b4

commit b95153e1e486df3cd0603d2300e1d55656dcd4b4
Author: Dominic Battre <battre@chromium.org>
Date: Tue Jun 05 08:19:58 2018

WebRtcGetUserMediaBrowserTest.TwoGetUserMediaWithSecondVideoCropped is flaky

TBR=guidou@chromium.org

Bug: 843844
Change-Id: Icb11f3b9903cb7ae35fc2644c8f35af258ffeb60
Reviewed-on: https://chromium-review.googlesource.com/1086788
Reviewed-by: Dominic Battré <battre@chromium.org>
Commit-Queue: Dominic Battré <battre@chromium.org>
Cr-Commit-Position: refs/heads/master@{#564403}
[modify] https://crrev.com/b95153e1e486df3cd0603d2300e1d55656dcd4b4/content/browser/webrtc/webrtc_getusermedia_browsertest.cc