Flag enable-spdy-proxy-auth enables the data reduction proxy.

BUG=336648

Review URL: https://codereview.chromium.org/140853009

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@248263 0039d316-1c4b-4281-b951-d872f2087c98
Render text in notifications using subpixel antialiasing on Mac.

Since we need a layer-backed view to support shadows and animations,
the text views must know that they are being drawn on an opaque
background in order to render subpixel text.

BUG=335794

Review URL: https://codereview.chromium.org/151673002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@248264 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 248263
SVN changes up to revision 248264