scheduler: Throttle timers in out-of-view frames

scheduler: Throttle timers in out-of-view frames

Throttle timer tasks to 1 Hz in out-of-view or invisible frames. This
reduces the power consumption and performance impact of these tasks,
which are not likely having any visible effect on the page anyway.

BUG=616519
Review-Url: https://codereview.chromium.org/2023033003
Cr-Commit-Position: refs/heads/master@{#415278}
(cherry picked from commit 7fec349e59e40dd9beee5f7eafa9e0db5c4ac1bd)

Committed: https://chromium.googlesource.com/chromium/src/+/c0d562a6b9a72f723fc5f15d55e0fac04f2dd623

[Sami, 2016-08-31 12:26:01]

Description was changed from

==========
scheduler: Throttle timers in out-of-view frames

Throttle timer tasks to 1 Hz in out-of-view or invisible frames. This
reduces the power consumption and performance impact of these tasks,
which are not likely having any visible effect on the page anyway.

BUG=616519

Review-Url: https://codereview.chromium.org/2023033003
Cr-Commit-Position: refs/heads/master@{#415278}
(cherry picked from commit 7fec349e59e40dd9beee5f7eafa9e0db5c4ac1bd)
==========

to

==========
scheduler: Throttle timers in out-of-view frames

Throttle timer tasks to 1 Hz in out-of-view or invisible frames. This
reduces the power consumption and performance impact of these tasks,
which are not likely having any visible effect on the page anyway.

BUG=616519

Review-Url: https://codereview.chromium.org/2023033003
Cr-Commit-Position: refs/heads/master@{#415278}
(cherry picked from commit 7fec349e59e40dd9beee5f7eafa9e0db5c4ac1bd)

Committed:
https://chromium.googlesource.com/chromium/src/+/c0d562a6b9a72f723fc5f15d55e0...
==========

[Sami, 2016-08-31 12:26:03]

Committed patchset #1 (id:1) manually as
c0d562a6b9a72f723fc5f15d55e0fac04f2dd623.