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The activity flags are used to notify the browser if the GPU process
crashes during shader compilation which could indicate a corrupted disk
shader cache. Hook this up for the persistent shader caching on the
GrContext for OOPR.

R=ericrk@chromium.org, piman@chromium.org

Bug: 854416
Cq-Include-Trybots: luci.chromium.try:android_optional_gpu_tests_rel;luci.chromium.try:linux_optional_gpu_tests_rel;luci.chromium.try:mac_optional_gpu_tests_rel;luci.chromium.try:win_optional_gpu_tests_rel
Change-Id: I4ed69d41768856b649a500dd5b86777bf0023d26
Reviewed-on: https://chromium-review.googlesource.com/1142367Reviewed-by: Antoine Labour <piman@chromium.org>
Commit-Queue: Khushal <khushalsagar@chromium.org>
Cr-Commit-Position: refs/heads/master@{#576819}