This change leverages an accurate implementation of ThreadTicks to
allow GPU Watchdog thread report watched thread specific CPU time
deltas to help with GPU hang crash dump analysis.

This includes a small refactoring of ThreadTicks class that adds an
overload of ThreadTicks::Now that accepts an arbitrary thread handle
as an argument. That is limited to Windows OS only but if necessary we
could extend it to other platforms.

BUG=596190

Review URL: https://codereview.chromium.org/1910063003

Cr-Commit-Position: refs/heads/master@{#389210}