content_browsertests failing on chromium.win/Win7 Tests (dbg)(1)

Builders failed on: 
- Win7 Tests (dbg)(1): 
  https://build.chromium.org/p/chromium.win/builders/Win7%20Tests%20%28dbg%29%281%29

meacer@

Could you take a look at the buildbog log and please assign the issue if this is not relevant to your change. I couldn't find any clear culprit for this failure, but these tests are from the apps and your CL is about the flaky test.
 (https://chromium.googlesource.com/chromium/src/+/158cc5cd0ffef904f0449bb4ea59a9f49f049818)

The following two test failures are common in most failures:
- PlatformAppBrowserTest.*
  - PlatformAppBrowserTest.LoadAndLaunchAppChromeRunning
  - PlatformAppBrowserTest.LoadAndLaunchAppWithFile
- StartupBrowserCreatorCorruptProfileTest.*
  - StartupBrowserCreatorCorruptProfileTest.LastUsedProfileFallbackFail
  - StartupBrowserCreatorCorruptProfileTest.NoFallbackForUserSelectedProfile
  - StartupBrowserCreatorCorruptProfileTest.PRE_NoFallbackForUserSelectedProfile