path ops : remove countdown overkill

tests/PathOpsThreadedCommon.cpp

 /*
  * Copyright 2012 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "PathOpsExtendedTest.h"
 #include "PathOpsThreadedCommon.h"
 
 PathOpsThreadedTestRunner::~PathOpsThreadedTestRunner() {
     for (int index = 0; index < fRunnables.count(); index++) {
         SkDELETE(fRunnables[index]);
     }
 }
 
 void PathOpsThreadedTestRunner::render() {
-    fCountdown.reset(fRunnables.count());
+    SkThreadPool pool(fNumThreads);
     for (int index = 0; index < fRunnables.count(); ++ index) {
-        fThreadPool.add(fRunnables[index]);
+        pool.add(fRunnables[index]);
     }
-    fCountdown.wait();
 #ifdef SK_DEBUG
     gDebugMaxWindSum = SK_MaxS32;
     gDebugMaxWindValue = SK_MaxS32;
 #endif
 }