Add InputMethod::GetTextInputMode

It retuns clients' input mode if clients is focused.

BUG=244688

Review URL: https://chromiumcodereview.appspot.com/23751002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@220318 0039d316-1c4b-4281-b951-d872f2087c98
9 files changed