Use the "enableCSSViewport" method to enable CSS viewport feature

Use the "enableCSSViewport" method to enable CSS viewport feature

Use the properly-named "WebRuntimeFeatures::enableCSSViewport" method
to enable the CSS viewport feature instead of wrongly-named "setCSSViewportEnabled".

BUG=424459
Committed: https://crrev.com/34cb061236f5c334606379297c2dfdfded0a490e
Cr-Commit-Position: refs/heads/master@{#300264}

[Mikhail, 2014-10-20 12:16:40]

mikhail.pozdnyakov@intel.com changed reviewers:
+ jochen@chromium.org

[Mikhail, 2014-10-20 12:37:08]

PTAL

[jochen (gone - plz use gerrit), 2014-10-20 13:56:03]

lgtm

[Mikhail, 2014-10-20 14:12:44]

The CQ bit was checked by mikhail.pozdnyakov@intel.com

[commit-bot: I haz the power, 2014-10-20 14:13:21]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/669673003/1

[commit-bot: I haz the power, 2014-10-20 14:27:31]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2014-10-20 14:28:13]

Patchset 1 (id:??) landed as
https://crrev.com/34cb061236f5c334606379297c2dfdfded0a490e
Cr-Commit-Position: refs/heads/master@{#300264}