DM: also run benches once.

bench/benchmain.cpp

 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "BenchTimer.h"
 #include "ResultsWriter.h"
 #include "SkBenchLogger.h"
@@ skipping 40 matching lines @@
 ///////////////////////////////////////////////////////////////////////////////
 
 class Iter {
 public:
     Iter() : fBenches(BenchRegistry::Head()), fGMs(skiagm::GMRegistry::Head()) {}
 
     SkBenchmark* next() {
         if (fBenches) {
             BenchRegistry::Factory f = fBenches->factory();
             fBenches = fBenches->next();
-            return (*f)();
+            return (*f)(NULL);
         }
 
         while (fGMs) {
             SkAutoTDelete<skiagm::GM> gm(fGMs->factory()(NULL));
             fGMs = fGMs->next();
             if (gm->getFlags() & skiagm::GM::kAsBench_Flag) {
                 return SkNEW_ARGS(SkGMBench, (gm.detach()));
             }
         }
 
@@ skipping 608 matching lines @@
     gContextFactory.destroyContexts();
 #endif
     return 0;
 }
 
 #if !defined(SK_BUILD_FOR_IOS) && !defined(SK_BUILD_FOR_NACL)
 int main(int argc, char * const argv[]) {
     return tool_main(argc, (char**) argv);
 }
 #endif