update handle leak suppression for HDCOffscreen::draw
TBR=bungeman@chromium.org
TEST=waterfall
BUG=346842

Review URL: https://codereview.chromium.org/180243008

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@253339 0039d316-1c4b-4281-b951-d872f2087c98
Add support for mac shortcuts for out of process PDF

This enables command+<key> shortcuts on Mac. It doesn't disable the ctrl+<key>
versions but I don't think it's problematic to enable both.

BUG=303491
R=koz@chromium.org
TBR=arv@chromium.org

Review URL: https://codereview.chromium.org/180683002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@253340 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 253340