Utilizing notifications.onShowSettings() event.

BUG=164227
TEST=Click at (i) icon in NC Settings for GN, make sure that the help URL opens.
R=robliao@chromium.org

Review URL: https://codereview.chromium.org/54643008

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@232488 0039d316-1c4b-4281-b951-d872f2087c98
Remove unused checklicenses suppressions.

BUG=157206, 98130, 98133, 157375, 98310
R=thestig@chromium.org

Review URL: https://codereview.chromium.org/49803003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@232489 0039d316-1c4b-4281-b951-d872f2087c98
This CL disables relaunch in metro mode menu if current browser is in software compositing mode.

R=cpu@chromium.org, sky@chromium.org, ananta, cpu, sky
BUG=308736

Review URL: https://codereview.chromium.org/52593011

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@232490 0039d316-1c4b-4281-b951-d872f2087c98
GTTF: Unify parallel test launching.

BUG=236893, 312747
R=sky@chromium.org

Review URL: https://codereview.chromium.org/55473002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@232491 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 232489
SVN changes up to revision 232491