Pass the high-dpi-support command line switch to plugin processes.

This is to ensure that we mark these processes as DPI aware at startup. Needed because NPAPI plugins perform UI operations like
creating windows parented to the browser etc.

BUG=341543
R=cpu@chromium.org, sky@chromium.org

Review URL: https://codereview.chromium.org/139253003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@251150 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 251150
Disable failing android tests on cros.

BUG=None
TEST=manual
NOTRY=True

Review URL: https://codereview.chromium.org/164293002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@251151 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 251151