GitLab

After crrev.com/c/812525, crash_keys doesn't need to be a separate
source_set duplicated in many components. Just make it part of the gpu
component.

Bug: 598854
Cq-Include-Trybots: master.tryserver.chromium.android:android_optional_gpu_tests_rel;master.tryserver.chromium.linux:linux_optional_gpu_tests_rel;master.tryserver.chromium.mac:mac_optional_gpu_tests_rel;master.tryserver.chromium.win:win_optional_gpu_tests_rel
Change-Id: Ibaa2e994087401f267a685e0a3c3c7a8f930656d
Reviewed-on: https://chromium-review.googlesource.com/849492Reviewed-by: Kenneth Russell <kbr@chromium.org>
Commit-Queue: Antoine Labour <piman@chromium.org>
Cr-Commit-Position: refs/heads/master@{#526905}