Carnitas: Move app_strings to ui/base/strings

To fix circular dependencies between ui/base/ui_base.gyp and app/app.gyp I'm moving app_strings to ui/base/strings.

BUG=72317
TEST=Compiled on Mac, Linux, Windows.

Review URL: http://codereview.chromium.org/6541035

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@77068 0039d316-1c4b-4281-b951-d872f2087c98
112 files changed