cc: Ensure that large damage doesn't register as "frame has no damage"

cc: Ensure that large damage doesn't register as "frame has no damage"

When we have accumulating damage from really large or really far rects
we can't union them correctly. So instead, introduce a DamageAccumulator
that detects this and an additional function ShouldDamageEverything
that ensures that if we run into this situation, we just damage
everything we can.

R=danakj@chromium.org, enne@chromium.org
BUG=678432, 686873
CQ_INCLUDE_TRYBOTS=master.tryserver.blink:linux_trusty_blink_rel

Review-Url: https://codereview.chromium.org/2632463005
Cr-Commit-Position: refs/heads/master@{#445208}
(cherry picked from commit efb8e7ef70d18b7380210e7244113653ab41cf42)

Review-Url: https://codereview.chromium.org/2683113003 .
Cr-Commit-Position: refs/branch-heads/2987@{#414}
Cr-Branched-From: ad51088c0e8776e8dcd963dbe752c4035ba6dab6-refs/heads/master@{#444943}
Committed: https://chromium.googlesource.com/chromium/src/+/4199618e79323f620735b60e833bdc77bca3c77c

[vmpstr, 2017-02-09 20:23:34]

Description was changed from

==========
cc: Ensure that large damage doesn't register as "frame has no damage"

When we have accumulating damage from really large or really far rects
we can't union them correctly. So instead, introduce a DamageAccumulator
that detects this and an additional function ShouldDamageEverything
that ensures that if we run into this situation, we just damage
everything we can.

R=danakj@chromium.org, enne@chromium.org
BUG=678432, 686873
CQ_INCLUDE_TRYBOTS=master.tryserver.blink:linux_trusty_blink_rel

Review-Url: https://codereview.chromium.org/2632463005
Cr-Commit-Position: refs/heads/master@{#445208}
(cherry picked from commit efb8e7ef70d18b7380210e7244113653ab41cf42)
==========

to

==========
cc: Ensure that large damage doesn't register as "frame has no damage"

When we have accumulating damage from really large or really far rects
we can't union them correctly. So instead, introduce a DamageAccumulator
that detects this and an additional function ShouldDamageEverything
that ensures that if we run into this situation, we just damage
everything we can.

R=danakj@chromium.org, enne@chromium.org
BUG=678432, 686873
CQ_INCLUDE_TRYBOTS=master.tryserver.blink:linux_trusty_blink_rel

Review-Url: https://codereview.chromium.org/2632463005
Cr-Commit-Position: refs/heads/master@{#445208}
(cherry picked from commit efb8e7ef70d18b7380210e7244113653ab41cf42)

Review-Url: https://codereview.chromium.org/2683113003 .
Cr-Commit-Position: refs/branch-heads/2987@{#414}
Cr-Branched-From:
ad51088c0e8776e8dcd963dbe752c4035ba6dab6-refs/heads/master@{#444943}
Committed:
https://chromium.googlesource.com/chromium/src/+/4199618e79323f620735b60e833b...
==========

[vmpstr, 2017-02-09 20:23:35]

Committed patchset #1 (id:1) manually as
4199618e79323f620735b60e833bdc77bca3c77c.