Use the newly introduced util method to set crash-keys from a GPUInfo
in both chrome and android_webview. This will also be used in mus.

BUG=643746
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

Earlier landed in r458276, reverted in r458968 because of size regression.

Review-Url: https://codereview.chromium.org/2751103008
Cr-Commit-Position: refs/heads/master@{#459202}