GTTF: Make new test launcher automatically use single process mode when debugged.

This also applies on Valgrind.

Use --test-launcher-debug-launcher to override auto-detection and debug
the launcher itself.

BUG=236893
R=sky@chromium.org

Review URL: https://codereview.chromium.org/101223009

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@240186 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 240186
Fix SessionLengthLimiterTest.RunWithUserActivityWhileNotWaiting

This makes a compare operator a Strict Weak Ordering.

Problem was detected by libstdc++ debug mode.

BUG=327445, 65151
R=satorux@chromium.org

Review URL: https://codereview.chromium.org/100973004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@240187 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 240187