Ignore Unicode BiDi control characters in missing glyphs check in RenderTextWin.

BUG=135160
TEST=Open chrome.exe with --lang=he and bring up context menu. There should be
no lag opening t.

Review URL: https://chromiumcodereview.appspot.com/10696058

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@145046 0039d316-1c4b-4281-b951-d872f2087c98
1 file changed