Make nanobench --outResultsFile only work with Release builds.

bench/nanobench.cpp

 /*
  * Copyright 2014 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include <ctype.h>
 
 #include "nanobench.h"
@@ skipping 1036 matching lines @@
     if (!FLAGS_writePath.isEmpty()) {
         SkDebugf("Writing files to %s.\n", FLAGS_writePath[0]);
         if (!sk_mkdir(FLAGS_writePath[0])) {
             SkDebugf("Could not create %s. Files won't be written.\n", FLAGS_writePath[0]);
             FLAGS_writePath.set(0, nullptr);
         }
     }
 
     SkAutoTDelete<ResultsWriter> log(new ResultsWriter);
     if (!FLAGS_outResultsFile.isEmpty()) {
+#if defined(SK_RELEASE)
         log.reset(new NanoJSONResultsWriter(FLAGS_outResultsFile[0]));
+#else
+        SkDebugf("I'm ignoring --outResultsFile because this is a Debug build.");
+        return 1;
+#endif
     }
 
     if (1 == FLAGS_properties.count() % 2) {
         SkDebugf("ERROR: --properties must be passed with an even number of arguments.\n");
         return 1;
     }
     for (int i = 1; i < FLAGS_properties.count(); i += 2) {
         log->property(FLAGS_properties[i-1], FLAGS_properties[i]);
     }
 
@@ skipping 185 matching lines @@
 
     return 0;
 }
 
 #if !defined SK_BUILD_FOR_IOS
 int main(int argc, char** argv) {
     SkCommandLineFlags::Parse(argc, argv);
     return nanobench_main();
 }
 #endif