Change the callers to use Location::ToString() instead.

Write() was mostly to support the profiling web UI which has been removed.

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: Ie58b4e34b83ef99bffc88d94467fb50ce627818f
Reviewed-on: https://chromium-review.googlesource.com/707310


Reviewed-by: Sky Malice <skym@chromium.org>
Reviewed-by: David Benjamin <davidben@chromium.org>
Commit-Queue: Brett Wilson <brettw@chromium.org>
Cr-Commit-Position: refs/heads/master@{#507498}