Mark cctests that don't use deprecated APIs as such

test/cctest/test-fast-dtoa.cc

 // Copyright 2006-2008 the V8 project authors. All rights reserved.
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 //
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 //       notice, this list of conditions and the following disclaimer.
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 //       with the distribution.
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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 "src/base/platform/platform.h"
 #include "src/diy-fp.h"
 #include "src/double.h"
 #include "src/fast-dtoa.h"
 #include "test/cctest/cctest.h"
 #include "test/cctest/gay-precision.h"
@@ skipping 246 matching lines @@
     CHECK_EQ(0, strcmp(current_test.representation, buffer.start()));
   }
   // The precomputed numbers contain many entries with many requested
   // digits. These have a high failure rate and we therefore expect a lower
   // success rate than for the shortest representation.
   CHECK_GT(succeeded*1.0/total, 0.85);
   // However with less than 15 digits almost the algorithm should almost always
   // succeed.
   CHECK_GT(succeeded_15*1.0/total_15, 0.9999);
 }