Disable inline autocompletion for IME in Omnibox by default.

This CL disables the feature by default due to http://crbug.com/310407 .
Sill you can enable the feature by explicitly setting the flag to 'Enable'.

The flag will be applied to Linux Aura, which is Views-based.

BUG=310407
TEST=Test manually
TBR=pkasting@chromium.org

Review URL: https://codereview.chromium.org/66503012

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@234484 0039d316-1c4b-4281-b951-d872f2087c98
[Android WebView] Wire up legacy quirks added to Blink

This is a companion for the following Blink changes:

  - Add a quirk to clobber initial scale in certain cases https://codereview.chromium.org/55073002/

  - Add a legacy quirk for 'user-scalable=no' case https://codereview.chromium.org/53053002/

Wires up the new settings and adds integration tests

BUG=312691,313754

Review URL: https://codereview.chromium.org/67193002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@234485 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 234484
SVN changes up to revision 234485