Convert #warning to comment to get iOS compiling

bench/BenchSysTimer_c.h

 
 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 #ifndef SkBenchSysTimer_DEFINED
 #define SkBenchSysTimer_DEFINED
 
 //Time
 #include <time.h>
-#warning standard clocks
 
+// Beware: this timer uses standard (as opposed to high precision) clocks
 class BenchSysTimer {
 public:
     void startWall();
     void startCpu();
     double endCpu();
     double endWall();
 private:
     clock_t start_cpu;
     time_t fStartWall;
 };
 
 #endif