Mark cctests that don't use deprecated APIs as such

test/cctest/test-hashmap.cc

 // Copyright 2008 the V8 project authors. All rights reserved.
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+// TODO(jochen): Remove this after the setting is turned on globally.
+#define V8_IMMINENT_DEPRECATION_WARNINGS
+
 #include <stdlib.h>
 
 #include "src/v8.h"
 #include "test/cctest/cctest.h"
 
 #include "src/hashmap.h"
 
 using namespace v8::internal;
 
 static bool DefaultMatchFun(void* a, void* b) {
@@ skipping 130 matching lines @@
     }
   }
   CHECK_EQ(0u, set.occupancy());
 }
 
 
 TEST(HashSet) {
   TestSet(Hash, 100);
   TestSet(CollisionHash, 50);
 }