Get rid of TestAuraInitializer.

This is a followup to crrev.com/238564 where we reused ui_test_pak in
aura_test_support. We remove TestAuraInitializer and
just merge the code into ContentTestSuite, that seems to be the most
suitable approach.

BUG=None
TEST=content_unittests,ash_unittests
R=ben@chromium.org,tony@chromium.org

Review URL: https://codereview.chromium.org/109093002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@240011 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 240011
Linux Aura: A window is not considered maximized if it is half-screened.

DesktopRootWindowHostX11::IsMaximized only returns true if the window is
both vertically and horizontally maximized. This avoids half-screened
windows behaving as if they were maximized (having non-resizable
borders, having a restore button instead of maximize, and on Unity
having missing caption buttons).

BUG=322378
TEST=Drag a Chrome window to the left or right side of screen, so that
it snaps to fill half of the screen. Observe that it is still resizable,
has rounded corners, a minimize, maximize (not restore) and close
button.

Review URL: https://codereview.chromium.org/110883009

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@240012 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 240012