webgl_conformance_gl_tests tab_capture_end2end_tests failing since https://codereview.chromium.org/2838473002

first failures:
https://build.chromium.org/p/chromium.gpu.fyi/builders/Win10%20Release%20%28NVIDIA%20Quadro%20P400%29/builds/577
https://build.chromium.org/p/chromium.gpu.fyi/builders/Win10%20Release%20%28Intel%20HD%20530%29/builds/515
https://build.chromium.org/p/chromium.gpu.fyi/builders/Win7%20Release%20%28AMD%20R7%20240%29/builds/679
https://build.chromium.org/p/chromium.gpu.fyi/builders/Mac%20Experimental%20Retina%20Release%20%28AMD%29/builds/619
https://build.chromium.org/p/chromium.gpu.fyi/builders/Mac%20Experimental%20Retina%20Release%20%28NVIDIA%29/builds/897
https://build.chromium.org/p/chromium.gpu.fyi/builders/Mac%20Pro%20Release%20%28AMD%29/builds/707
https://build.chromium.org/p/chromium.gpu.fyi/builders/Linux%20Release%20%28AMD%20R7%20240%29/builds/2028
https://build.chromium.org/p/chromium.gpu.fyi/builders/Linux%20Release%20%28Intel%20HD%20530%29/builds/509
https://build.chromium.org/p/chromium.gpu.fyi/builders/Linux%20Release%20%28NVIDIA%20Quadro%20P400%29/builds/275

sample error:
C:\b\c\b\Win10_Release__Intel_HD_530_\src\out\Release\browser_tests.exe --test-launcher-bot-mode --enable-gpu --test-launcher-jobs=1 --test-launcher-filter-file=../../testing/buildbot/filters/tab-capture-end2end-tests.browser_tests.filter --test-launcher-summary-output=c:\users\chrome~2\appdata\local\temp\tmp8teuzd.json
[0423/180937.104:ERROR:test_launcher.cc(853)] Failed to read the filter file.