Transfer date/time value to chooser as double

BUG=324151

Review URL: https://codereview.chromium.org/85643002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@238594 0039d316-1c4b-4281-b951-d872f2087c98
Android can play data uri media items.

BUG=324713

Review URL: https://codereview.chromium.org/98563002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@238595 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 238595
app_shell attempts to load an app when passed --app=<path/to/app>

Initialize the extensions system with a BrowserContext (not a profile). This
doesn't work yet, but allows us to see how far we can run and helps identify
the next area to work on.

BUG=None
TEST=None, for developers only

Review URL: https://codereview.chromium.org/99073004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@238596 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 238596