Implement MediaValues for initial viewport.

Implement MediaValues for initial viewport.

Viewport-dependent media queries evaluate in the context of the initial
viewport when collecting @viewport rules as specified in [1]. Implement
a MediaValuesInitialViewport which returns the initial viewport
dimensions instead of the actual viewport. This change doesn't fix
issue 332763 until we start collecting author @viewport rules before
creating RuleSets.

[1] https://www.w3.org/TR/css-device-adapt-1/#media-queries

R=timloh@chromium.org
BUG=332763
Committed: https://crrev.com/cdb270396aeb667c46e53ed6df0c01fa8ddf4a74
Cr-Commit-Position: refs/heads/master@{#425628}

[rune, 2016-10-14 10:57:57]

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

[commit-bot: I haz the power, 2016-10-14 10:58:12]

Dry run: 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, 2016-10-14 12:28:28]

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

[commit-bot: I haz the power, 2016-10-14 12:28:29]

Dry run: Try jobs failed on following builders:
  win_chromium_compile_dbg_ng on master.tryserver.chromium.win (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.win/builders/win_chromium_comp...)

[rune, 2016-10-14 12:49:42]

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

[commit-bot: I haz the power, 2016-10-14 12:49:58]

Dry run: 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, 2016-10-14 14:33:29]

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

[commit-bot: I haz the power, 2016-10-14 14:33:29]

Dry run: This issue passed the CQ dry run.

[rune, 2016-10-14 14:41:49]

ptal

[Timothy Loh, 2016-10-17 03:54:57]

lgtm

[rune, 2016-10-17 06:30:11]

The CQ bit was checked by rune@opera.com

[commit-bot: I haz the power, 2016-10-17 06:30:27]

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, 2016-10-17 07:48:16]

Committed patchset #2 (id:20001)

[commit-bot: I haz the power, 2016-10-17 07:49:53]

Description was changed from

==========
Implement MediaValues for initial viewport.

Viewport-dependent media queries evaluate in the context of the initial
viewport when collecting @viewport rules as specified in [1]. Implement
a MediaValuesInitialViewport which returns the initial viewport
dimensions instead of the actual viewport. This change doesn't fix
issue 332763 until we start collecting author @viewport rules before
creating RuleSets.

[1] https://www.w3.org/TR/css-device-adapt-1/#media-queries

R=timloh@chromium.org
BUG=332763
==========

to

==========
Implement MediaValues for initial viewport.

Viewport-dependent media queries evaluate in the context of the initial
viewport when collecting @viewport rules as specified in [1]. Implement
a MediaValuesInitialViewport which returns the initial viewport
dimensions instead of the actual viewport. This change doesn't fix
issue 332763 until we start collecting author @viewport rules before
creating RuleSets.

[1] https://www.w3.org/TR/css-device-adapt-1/#media-queries

R=timloh@chromium.org
BUG=332763

Committed: https://crrev.com/cdb270396aeb667c46e53ed6df0c01fa8ddf4a74
Cr-Commit-Position: refs/heads/master@{#425628}
==========

[commit-bot: I haz the power, 2016-10-17 07:49:54]

Patchset 2 (id:??) landed as
https://crrev.com/cdb270396aeb667c46e53ed6df0c01fa8ddf4a74
Cr-Commit-Position: refs/heads/master@{#425628}