See: https://build.chromium.org/p/chromium.linux/builders/Linux%20Tests%20%28dbg%29%281%29/builds/53689

https://build.chromium.org/p/chromium.linux/builders/Linux%20Tests%20%28dbg%29%281%29/builds/53689/steps/browser_tests%20on%20Ubuntu-12.04/logs/DomDistillerViewerSourceBrowserTest.PrefChange

DomDistillerViewerSourceBrowserTest.PrefChange (run #1):
[ RUN      ] DomDistillerViewerSourceBrowserTest.PrefChange
[31070:31070:0422/060113:WARNING:histogram_base.cc(131)] 2 histograms were created before reporting was enabled.
[1:1:0422/060115:ERROR:memory_mapped_file.cc(40)] Couldn't open /tmp/runb1qmRo/out/Debug/chrome_material_200_percent.pak
[1:1:0422/060115:ERROR:data_pack.cc(80)] Failed to mmap datapack
[1:1:0422/060115:ERROR:memory_mapped_file.cc(40)] Couldn't open /tmp/runb1qmRo/out/Debug/chrome_200_percent.pak
[1:1:0422/060115:ERROR:data_pack.cc(80)] Failed to mmap datapack
[1:1:0422/060115:WARNING:histogram_base.cc(131)] 3 histograms were created before reporting was enabled.
Xlib:  extension "RANDR" missing on display ":9".
[31070:31070:0422/060115:ERROR:memory_mapped_file.cc(40)] Couldn't open /tmp/runb1qmRo/out/Debug/chrome_material_200_percent.pak
[31070:31070:0422/060115:ERROR:data_pack.cc(80)] Failed to mmap datapack
[31070:31070:0422/060115:ERROR:memory_mapped_file.cc(40)] Couldn't open /tmp/runb1qmRo/out/Debug/chrome_200_percent.pak
[31070:31070:0422/060115:ERROR:data_pack.cc(80)] Failed to mmap datapack
Xlib:  extension "RANDR" missing on display ":9".
[31070:31070:0422/060115:WARNING:audio_manager.cc(307)] Multiple instances of AudioManager detected
[31070:31070:0422/060115:WARNING:audio_manager.cc(281)] Multiple instances of AudioManager detected
[31070:31070:0422/060116:WARNING:password_store_factory.cc(250)] Using basic (unencrypted) store for password storage. See https://chromium.googlesource.com/chromium/src/+/master/docs/linux_password_storage.md for more information about password storage options.
[31162:31162:0422/060116:WARNING:histogram_base.cc(131)] 1 histograms were created before reporting was enabled.
[31070:31248:0422/060117:WARNING:simple_synchronous_entry.cc(929)] Could not open platform files for entry.
../../chrome/browser/dom_distiller/dom_distiller_viewer_source_browsertest.cc:235: Failure
Value of: contents_after_nav->GetLastCommittedURL()
  Actual: chrome-distiller://331a57d2-1c02-4af2-bb25-1513d2b97e92/?url=http%3A%2F%2Fwww.example.com%2F1#loaded#loaded
Expected: url
Which is: chrome-distiller://331a57d2-1c02-4af2-bb25-1513d2b97e92/?url=http%3A%2F%2Fwww.example.com%2F1
[  FAILED  ] DomDistillerViewerSourceBrowserTest.PrefChange, where TypeParam =  and GetParam() =  (4985 ms)