Replace base::Timer with behavior-specific timers in //chrome and //ui

This CL replaces base::Timer with its subclasses.
As base::Timer changes its behavior subject to its construction time
flags, that makes hard to see the actual timer behavior, especially
it's unclear when a timer is injected from other components.
Also, that OnceCallback support of base::Timer is hard to implement on
the dynamically determined invocation pattern.

Bug: 850247
Change-Id: I842cb4ffc6eeb2715b7abd710a232230fae627bf
Reviewed-by: Scott Violet <>
Commit-Queue: Taiju Tsuiki <>
Cr-Commit-Position: refs/heads/master@{#574729}
33 files changed