Revert 250439 "Mojo: Add a public/environment/test_support.h."

This isn't quite right. It breaks (on a Linux shared library build)
mojo_shell_unittests at runtime. The stuff in test_support.h also
differs considerably from other stuff in environment/ (it's not
something chosen by the app), so it doesn't belong there. Hmmm.

> Mojo: Add a public/environment/test_support.h.
> 
> Remove public/tests's base dependency.
> 
> R=darin@chromium.org
> 
> Review URL: https://codereview.chromium.org/145073008

TBR=viettrungluu@chromium.org,darin@chromium.org

Review URL: https://codereview.chromium.org/150203008

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@250454 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 250454
Exclude tools/ from console spam PRESUBMIT

tools/ are often standalone or intended to interact with console output.

R=maruel@chromium.org

Review URL: https://codereview.chromium.org/130263011

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@250455 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 250455