Mark cctests that don't use deprecated APIs as such

test/cctest/gay-shortest.cc

Index: test/cctest/gay-shortest.cc
diff --git a/test/cctest/gay-shortest.cc b/test/cctest/gay-shortest.cc
index 456055392c2881a31d232d927468211b2d6b38c0..f02b3eab979a4a7fb4efbefcd1e3c6105ea7bdb8 100644
--- a/test/cctest/gay-shortest.cc
+++ b/test/cctest/gay-shortest.cc
@@ -29,6 +29,9 @@
 // have been generated using Gay's dtoa to produce the shortest representation:
 //          decimal_rep = dtoa(v, 0, 0, &decimal_point, &sign, NULL);
 
+// TODO(jochen): Remove this after the setting is turned on globally.
+#define V8_IMMINENT_DEPRECATION_WARNINGS
+
 #include "src/v8.h"
 
 #include "test/cctest/gay-shortest.h"