Make CPU profiler do not hog 100% of CPU.

test/cctest/test-api.cc

Index: test/cctest/test-api.cc
diff --git a/test/cctest/test-api.cc b/test/cctest/test-api.cc
index f54428875c88bd95185d87015ce01a36da22c60f..12f481019b05cfe2d87693b15354ac9f2514d519 100644
--- a/test/cctest/test-api.cc
+++ b/test/cctest/test-api.cc
@@ -13095,10 +13095,12 @@ class RegExpInterruptionThread : public v8::base::Thread {
          v8::base::NoBarrier_Load(&regexp_interruption_data.loop_count) < 7;
          v8::base::NoBarrier_AtomicIncrement(
              &regexp_interruption_data.loop_count, 1)) {
-      v8::base::OS::Sleep(50);  // Wait a bit before requesting GC.
+      // Wait a bit before requesting GC.
+      v8::base::OS::Sleep(v8::base::TimeDelta::FromMilliseconds(50));
       reinterpret_cast<i::Isolate*>(isolate_)->stack_guard()->RequestGC();
     }
-    v8::base::OS::Sleep(50);  // Wait a bit before terminating.
+    // Wait a bit before terminating.
+    v8::base::OS::Sleep(v8::base::TimeDelta::FromMilliseconds(50));
     v8::V8::TerminateExecution(isolate_);
   }
 
@@ -18812,7 +18814,7 @@ class ThreadInterruptTest {
       struct sigaction action;
 
       // Ensure that we'll enter waiting condition
-      v8::base::OS::Sleep(100);
+      v8::base::OS::Sleep(v8::base::TimeDelta::FromMilliseconds(100));
 
       // Setup signal handler
       memset(&action, 0, sizeof(action));
@@ -18823,7 +18825,7 @@ class ThreadInterruptTest {
       kill(getpid(), SIGCHLD);
 
       // Ensure that if wait has returned because of error
-      v8::base::OS::Sleep(100);
+      v8::base::OS::Sleep(v8::base::TimeDelta::FromMilliseconds(100));
 
       // Set value and signal semaphore
       test_->sem_value_ = 1;