Reverse sense of convex-quad-fix compiler flag

https://codereview.appspot.com/7206045/



git-svn-id: http://skia.googlecode.com/svn/trunk@7349 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/bench/PathBench.cpp b/bench/PathBench.cpp
index ad9ca1d..6fd0759 100644
--- a/bench/PathBench.cpp
+++ b/bench/PathBench.cpp
@@ -745,7 +745,7 @@
         add_corner_arc(path, r, xCorner, yCorner, 180);
         path->close();
 
-#ifdef SK_REDEFINE_ROOT2OVER2_TO_MAKE_ARCTOS_CONVEX
+#ifndef SK_IGNORE_CONVEX_QUAD_OPT
         SkASSERT(path->isConvex());
 #endif
     }