Major bench refactoring.

bench/MutexBench.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 "SkBenchmark.h"
 #include "SkThread.h"
 
 class MutexBench : public SkBenchmark {
-    enum {
-        N = SkBENCHLOOP(80),
-        M = SkBENCHLOOP(200)
-    };
 public:
     MutexBench(void* param) : INHERITED(param) {
         fIsRendering = false;
     }
 protected:
     virtual const char* onGetName() {
         return "mutex";
     }
 
     virtual void onDraw(SkCanvas*) {
-        for (int i = 0; i < N; i++) {
-            SK_DECLARE_STATIC_MUTEX(mu);
-            for (int j = 0; j < M; j++) {
-                mu.acquire();
-                mu.release();
-            }
+        SK_DECLARE_STATIC_MUTEX(mu);
+        for (int i = 0; i < this->getLoops(); i++) {
+            mu.acquire();
+            mu.release();
         }
     }
 
 private:
     typedef SkBenchmark INHERITED;
 };
 
 ///////////////////////////////////////////////////////////////////////////////
 
 static SkBenchmark* Fact(void* p) { return new MutexBench(p); }
 
 static BenchRegistry gReg01(Fact);