Dependent on libyuv if webrtc is enabled in Android

BUG=336586

Review URL: https://codereview.chromium.org/141653010

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@246555 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 246555
Create browser if it's missing for cloud print sign-in.
Kiosk mode may have no browser.

BUG=336909

Review URL: https://codereview.chromium.org/143003014

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@246556 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 246556