Fix iOS build by centralizing --writePath.

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 "Benchmark.h"
@@ skipping 15 matching lines @@
 #if SK_SUPPORT_GPU
     #include "gl/GrGLDefines.h"
     #include "GrContextFactory.h"
     GrContextFactory gGrFactory;
 #endif
 
 __SK_FORCE_IMAGE_DECODER_LINKING;
 
 static const int kAutoTuneLoops = -1;
 
-static const int kDefaultLoops = 
+static const int kDefaultLoops =
 #ifdef SK_DEBUG
     1;
 #else
     kAutoTuneLoops;
 #endif
 
 static SkString loops_help_txt() {
     SkString help;
     help.printf("Number of times to run each bench. Set this to %d to auto-"
                 "tune for each bench. Timings are only reported when auto-tuning.",
                 kAutoTuneLoops);
     return help;
 }
 
 DEFINE_int32(loops, kDefaultLoops, loops_help_txt().c_str());
 
-DEFINE_string2(writePath, w, "", "If set, write benches here as .pngs.");
-
 DEFINE_int32(samples, 10, "Number of samples to measure for each bench.");
 DEFINE_int32(overheadLoops, 100000, "Loops to estimate timer overhead.");
 DEFINE_double(overheadGoal, 0.0001,
               "Loop until timer overhead is at most this fraction of our measurments.");
 DEFINE_double(gpuMs, 5, "Target bench time in millseconds for GPU.");
 DEFINE_int32(gpuFrameLag, 5, "Overestimate of maximum number of frames GPU allows to lag.");
 
 DEFINE_string(outResultsFile, "", "If given, write results here as JSON.");
 DEFINE_int32(maxCalibrationAttempts, 3,
              "Try up to this many times to guess loops for a bench, or skip the bench.");
@@ skipping 618 matching lines @@
 
     return 0;
 }
 
 #if !defined SK_BUILD_FOR_IOS
 int main(int argc, char** argv) {
     SkCommandLineFlags::Parse(argc, argv);
     return nanobench_main();
 }
 #endif