Fix DOM KeyboardEvent 'repeat' state

The 'repeat' state of a DOM KeyboardEvent was always false. The
Aura->blink event modifier mapper was not plumbing it through. Do so!

BUG=263724,394907
TEST=document.body.onkeydown=function(e){console.log(e.repeat);};

Review URL: https://codereview.chromium.org/402613010

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@284263 0039d316-1c4b-4281-b951-d872f2087c98
2 files changed