Only promote fixed position elements on low dpi without transform or opacity.

Only promote fixed position elements on low dpi without transform or opacity.

If the element has a transform or opacity it may lose LCD text if promoted.

TEST=CompositingReasonFinderTest.OnlyNonTransformedFixedLayersPromoted, CompositingReasonFinderTest.OnlyOpaqueFixedLayersPromoted
BUG=626200
CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.linux:linux_layout_tests_slimming_paint_v2

Committed: https://crrev.com/ab7a5662a1de02e93aed48a8b41dccdef3832841
Cr-Commit-Position: refs/heads/master@{#429143}

[flackr, 2016-10-31 17:29:37]

Description was changed from

==========
Only promote fixed position elements on low dpi without transform or opacity.

If the element has a transform or opacity it may lose LCD text if promoted.

TEST=CompositingReasonFinderTest.OnlyNonTransformedFixedLayersPromoted,
CompositingReasonFinderTest.OnlyOpaqueFixedLayersPromoted
BUG=626200
==========

to

==========
Only promote fixed position elements on low dpi without transform or opacity.

If the element has a transform or opacity it may lose LCD text if promoted.

TEST=CompositingReasonFinderTest.OnlyNonTransformedFixedLayersPromoted,
CompositingReasonFinderTest.OnlyOpaqueFixedLayersPromoted
BUG=626200
CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.linux:linux_layout_tests_slimming_paint_v2
==========

[flackr, 2016-10-31 17:38:37]

flackr@chromium.org changed reviewers:
+ schenney@chromium.org

[flackr, 2016-10-31 17:38:38]

PTAL, thanks!

https://codereview.chromium.org/2459393003/diff/20001/third_party/WebKit/Sour...
File
third_party/WebKit/Source/core/layout/compositing/CompositingReasonFinderTest.cpp
(right):

https://codereview.chromium.org/2459393003/diff/20001/third_party/WebKit/Sour...
third_party/WebKit/Source/core/layout/compositing/CompositingReasonFinderTest.cpp:29:
TEST_F(CompositingReasonFinderTest, PromoteOpaqueFixedPosition) {
This test is moved from CompositedLayerMappingTest, since it is actually testing
functionality in CompositingReasonFinder.

[Stephen Chennney, 2016-10-31 19:12:35]

LGTM. Thanks for adding the test. Moving forward I'll see what else we can do
with that.

[flackr, 2016-10-31 19:14:42]

The CQ bit was checked by flackr@chromium.org

[commit-bot: I haz the power, 2016-10-31 19:15:08]

CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2016-10-31 20:46:07]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2016-10-31 20:46:09]

Try jobs failed on following builders:
  win_chromium_rel_ng on master.tryserver.chromium.win (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.win/builders/win_chromium_rel_...)

[flackr, 2016-11-01 18:29:50]

The CQ bit was checked by flackr@chromium.org

[flackr, 2016-11-01 18:29:51]

The patchset sent to the CQ was uploaded after l-g-t-m from
schenney@chromium.org
Link to the patchset: https://codereview.chromium.org/2459393003/#ps40001
(title: "Reset tests which are no longer composited to old expectations.")

[commit-bot: I haz the power, 2016-11-01 18:30:09]

CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2016-11-01 22:51:58]

Committed patchset #3 (id:40001)

[commit-bot: I haz the power, 2016-11-01 22:54:53]

Description was changed from

==========
Only promote fixed position elements on low dpi without transform or opacity.

If the element has a transform or opacity it may lose LCD text if promoted.

TEST=CompositingReasonFinderTest.OnlyNonTransformedFixedLayersPromoted,
CompositingReasonFinderTest.OnlyOpaqueFixedLayersPromoted
BUG=626200
CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.linux:linux_layout_tests_slimming_paint_v2
==========

to

==========
Only promote fixed position elements on low dpi without transform or opacity.

If the element has a transform or opacity it may lose LCD text if promoted.

TEST=CompositingReasonFinderTest.OnlyNonTransformedFixedLayersPromoted,
CompositingReasonFinderTest.OnlyOpaqueFixedLayersPromoted
BUG=626200
CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.linux:linux_layout_tests_slimming_paint_v2

Committed: https://crrev.com/ab7a5662a1de02e93aed48a8b41dccdef3832841
Cr-Commit-Position: refs/heads/master@{#429143}
==========

[commit-bot: I haz the power, 2016-11-01 22:54:54]

Patchset 3 (id:??) landed as
https://crrev.com/ab7a5662a1de02e93aed48a8b41dccdef3832841
Cr-Commit-Position: refs/heads/master@{#429143}