Make parallel unit testing work on windows

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());
+    for (int index = 0; index < fRunnables.count(); ++ index) {
+        fThreadPool.add(fRunnables[index]);
+    }
+    fCountdown.wait();
+#ifdef SK_DEBUG
+    gDebugMaxWindSum = SK_MaxS32;
+    gDebugMaxWindValue = SK_MaxS32;
+#endif
+}
+
+