Implement DriveAppRegistry::UninstallApp() and GetAppList().

BUG=324166

Review URL: https://codereview.chromium.org/133123004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@244182 0039d316-1c4b-4281-b951-d872f2087c98
Blink roll 164850:164871

http://build.chromium.org/f/chromium/perf/dashboard/ui/changelog_blink.html?url=/trunk&range=164851:164871&mode=html
TBR=
BUG=

Review URL: https://codereview.chromium.org/133833002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@244183 0039d316-1c4b-4281-b951-d872f2087c98
Update .DEPS.git

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@244184 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 244184