Collect media query results for non-matching stylesheets.

Collect media query results for non-matching stylesheets.

Viewport and device dependent media query results are collected after
an active stylesheet update happen. The results are collected on the
ScopedStyleResolvers and propagated to the CSSGlobalRuleSet. It's
necessary that the active stylesheet update causes these media query
results to be up-to-date so that e.g. a viewport resize checks these
results to detect that we need an active stylesheet update for a given
resize.

That did not happen when we only added sheets for which the media
attrbute did not match, because adding a sheet with a null RuleSet does
not affect the computed style and the changed_rule_sets set was empty.

Now, if we add or remove a sheet which does not apply, and that sheet
has a viewport or device dependent media query, still return
kActiveSheetsAppended or kActiveSheetsChanged to trigger the re-
collection of those media query results.

BUG=710878
Review-Url: https://codereview.chromium.org/2829873002
Cr-Commit-Position: refs/heads/master@{#465912}
Committed: https://chromium.googlesource.com/chromium/src/+/7a7892d7272ce168b1db7f4da87ae70d5e23cecc

[rune, 2017-04-19 22:46:39]

The CQ bit was checked by rune@opera.com to run a CQ dry run

[commit-bot: I haz the power, 2017-04-19 22:47:05]

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

[rune, 2017-04-19 23:16:06]

rune@opera.com changed reviewers:
+ meade@chromium.org

[commit-bot: I haz the power, 2017-04-20 00:23:30]

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

[commit-bot: I haz the power, 2017-04-20 00:23:31]

Dry run: This issue passed the CQ dry run.

[meade_UTC10, 2017-04-20 03:10:46]

lgtm

lgtm

[meade_UTC10, 2017-04-20 03:10:46]

lgtm

[rune, 2017-04-20 06:08:47]

The CQ bit was checked by rune@opera.com

[commit-bot: I haz the power, 2017-04-20 06:09:02]

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, 2017-04-20 06:12:42]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1492668527168270, "parent_rev":
"ca2ec763405c18960ad1ee66e5ac964a00c257e5", "commit_rev":
"7a7892d7272ce168b1db7f4da87ae70d5e23cecc"}

[commit-bot: I haz the power, 2017-04-20 06:13:10]

Description was changed from

==========
Collect media query results for non-matching stylesheets.

Viewport and device dependent media query results are collected after
an active stylesheet update happen. The results are collected on the
ScopedStyleResolvers and propagated to the CSSGlobalRuleSet. It's
necessary that the active stylesheet update causes these media query
results to be up-to-date so that e.g. a viewport resize checks these
results to detect that we need an active stylesheet update for a given
resize.

That did not happen when we only added sheets for which the media
attrbute did not match, because adding a sheet with a null RuleSet does
not affect the computed style and the changed_rule_sets set was empty.

Now, if we add or remove a sheet which does not apply, and that sheet
has a viewport or device dependent media query, still return
kActiveSheetsAppended or kActiveSheetsChanged to trigger the re-
collection of those media query results.

BUG=710878
==========

to

==========
Collect media query results for non-matching stylesheets.

Viewport and device dependent media query results are collected after
an active stylesheet update happen. The results are collected on the
ScopedStyleResolvers and propagated to the CSSGlobalRuleSet. It's
necessary that the active stylesheet update causes these media query
results to be up-to-date so that e.g. a viewport resize checks these
results to detect that we need an active stylesheet update for a given
resize.

That did not happen when we only added sheets for which the media
attrbute did not match, because adding a sheet with a null RuleSet does
not affect the computed style and the changed_rule_sets set was empty.

Now, if we add or remove a sheet which does not apply, and that sheet
has a viewport or device dependent media query, still return
kActiveSheetsAppended or kActiveSheetsChanged to trigger the re-
collection of those media query results.

BUG=710878

Review-Url: https://codereview.chromium.org/2829873002
Cr-Commit-Position: refs/heads/master@{#465912}
Committed:
https://chromium.googlesource.com/chromium/src/+/7a7892d7272ce168b1db7f4da87a...
==========

[commit-bot: I haz the power, 2017-04-20 06:13:11]

Committed patchset #1 (id:1) as
https://chromium.googlesource.com/chromium/src/+/7a7892d7272ce168b1db7f4da87a...