New warning -> new pattern for fingers to learn for asserting failure.

The Ubuntu Clang compile bot has a warning enabled now that yells about !"foo"
before it breaks Chrome's build where the same warning is -Werror.

BUG=
R=reed@google.com

Review URL: https://codereview.chromium.org/23586002

git-svn-id: http://skia.googlecode.com/svn/trunk@10937 2bbb7eff-a529-9590-31e7-b0007b416f81
1 file changed