Clean up dependencies on X11 libraries
This converts the remaining targets that depend on X11 libraries over to
depending on targets from build/linux/system.gyp instead of adding the
libraries manually to the link line. This ensures that the link line is
generated with pkg-config and makes the dependencies a bit tighter by
getting rid of the all_dependent_settings entry in ui/ui.gyp
BUG=339518
Review URL: https://codereview.chromium.org/
151713003
git-svn-id: svn://svn.chromium.org/chrome/trunk/src@250311 0039d316-1c4b-4281-b951-d872f2087c98