GitLab

GPU.WatchdogThread.Event(kGpuWatchdogStart) was added too early (eg.
watchdog creation time) that it couldn't be persistent. This histogram data
was lost after crash or browser exit.

Now delay the recording of kGpuWatchdogStart until the first
OnWatchdogTimeout() to ensure this metric is created in persistent memory.

Bug: 988344, 949839
Change-Id: I8829d31209511d34220eb17a4f39017929d7e0a1
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1929867
Commit-Queue: Maggie Chen <magchen@chromium.org>
Reviewed-by: Zhenyao Mo <zmo@chromium.org>
Cr-Commit-Position: refs/heads/master@{#718462}