Support inputmode attribute for Windows Aura.

BUG=244688
TEST=Windows7 with MS-IME and GoogleJapaneseInput. Windows8 desktop using onscreen keyboard with MS-IME and GoogleJapaneseInput. The known issue about onscreenkeyboard and MS-IME still happens. https://src.chromium.org/viewvc/chrome?revision=220221&view=revision

Review URL: https://chromiumcodereview.appspot.com/23445020

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@221588 0039d316-1c4b-4281-b951-d872f2087c98
3 files changed