Adjust DPI threshold for high DPI

BUG=chrome-os-partner:25817

Review URL: https://codereview.chromium.org/174223002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@252402 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 252402
Adding temporary redirects for each repository

We will fix up redirects more officially server-side post-launch.

NOTRY=true

Review URL: https://codereview.chromium.org/171563008

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@252403 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 252403