FrameView: Don't throttle display:none frames

FrameView: Don't throttle display:none frames

While migrating to use IntersectionObserver to control frame throttling
we accidentally also started throttling display:none frames (which IObs.
considers invisible). This is not safe because many sites use such
frames for driving UI logic.

This patch disallows throttling for display:none frames. The revised
logic also matches the frame throttling implementation in Safari.

BUG=680925
TEST=Open the login popup twice on http://www.espn.in/ and observe no delay.

Review-Url: https://codereview.chromium.org/2658063002
Cr-Commit-Position: refs/heads/master@{#446419}
(cherry picked from commit 02d1c14d47b948cf6b4eb49c3b4cef697525f03e)

Review-Url: https://codereview.chromium.org/2660633002 .
Cr-Commit-Position: refs/branch-heads/2987@{#141}
Cr-Branched-From: ad51088c0e8776e8dcd963dbe752c4035ba6dab6-refs/heads/master@{#444943}
Committed: https://chromium.googlesource.com/chromium/src/+/613b3cabab9f93e9c01962c327239b2f6c81d9c5

[Sami, 2017-01-27 10:43:40]

Description was changed from

==========
FrameView: Don't throttle display:none frames

While migrating to use IntersectionObserver to control frame throttling
we accidentally also started throttling display:none frames (which IObs.
considers invisible). This is not safe because many sites use such
frames for driving UI logic.

This patch disallows throttling for display:none frames. The revised
logic also matches the frame throttling implementation in Safari.

BUG=680925
TEST=Open the login popup twice on http://www.espn.in/ and observe no delay.

Review-Url: https://codereview.chromium.org/2658063002
Cr-Commit-Position: refs/heads/master@{#446419}
(cherry picked from commit 02d1c14d47b948cf6b4eb49c3b4cef697525f03e)
==========

to

==========
FrameView: Don't throttle display:none frames

While migrating to use IntersectionObserver to control frame throttling
we accidentally also started throttling display:none frames (which IObs.
considers invisible). This is not safe because many sites use such
frames for driving UI logic.

This patch disallows throttling for display:none frames. The revised
logic also matches the frame throttling implementation in Safari.

BUG=680925
TEST=Open the login popup twice on http://www.espn.in/ and observe no delay.

Review-Url: https://codereview.chromium.org/2658063002
Cr-Commit-Position: refs/heads/master@{#446419}
(cherry picked from commit 02d1c14d47b948cf6b4eb49c3b4cef697525f03e)

Review-Url: https://codereview.chromium.org/2660633002 .
Cr-Commit-Position: refs/branch-heads/2987@{#141}
Cr-Branched-From:
ad51088c0e8776e8dcd963dbe752c4035ba6dab6-refs/heads/master@{#444943}
Committed:
https://chromium.googlesource.com/chromium/src/+/613b3cabab9f93e9c01962c32723...
==========

[Sami, 2017-01-27 10:43:41]

Committed patchset #1 (id:1) manually as
613b3cabab9f93e9c01962c327239b2f6c81d9c5.