Make CPU profiler do not hog 100% of CPU.

test/cctest/test-log.cc

Index: test/cctest/test-log.cc
diff --git a/test/cctest/test-log.cc b/test/cctest/test-log.cc
index 2386cec55bafa77ee3b1074d1e4e7f135b9fbcae..7d7543ead5e2c4ebf3cb7712d888c75e27eeb98f 100644
--- a/test/cctest/test-log.cc
+++ b/test/cctest/test-log.cc
@@ -192,7 +192,7 @@ class LoopingJsThread : public LoopingThread {
             "var j; for (var i=0; i<10000; ++i) { j = Math.sin(i); }");
       }
       context.Dispose();
-      i::OS::Sleep(1);
+      i::OS::Sleep(v8::base::TimeDelta::FromMilliseconds(1));
     }
   }
 };
@@ -212,7 +212,7 @@ class LoopingNonJsThread : public LoopingThread {
     SignalRunning();
     while (IsRunning()) {
       i = std::sin(i);
-      i::OS::Sleep(1);
+      i::OS::Sleep(v8::base::TimeDelta::FromMilliseconds(1));
     }
   }
 };