Make CPU profiler do not hog 100% of CPU.

test/cctest/test-api.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 13077 matching lines @@
 class RegExpInterruptionThread : public v8::base::Thread {
  public:
   explicit RegExpInterruptionThread(v8::Isolate* isolate)
       : Thread(Options("TimeoutThread")), isolate_(isolate) {}
 
   virtual void Run() {
     for (v8::base::NoBarrier_Store(&regexp_interruption_data.loop_count, 0);
          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_);
   }
 
  private:
   v8::Isolate* isolate_;
 };
 
 
 void RunBeforeGC(v8::GCType type, v8::GCCallbackFlags flags) {
   if (v8::base::NoBarrier_Load(&regexp_interruption_data.loop_count) != 2) {
@@ skipping 5693 matching lines @@
 
   class InterruptThread : public v8::base::Thread {
    public:
     explicit InterruptThread(ThreadInterruptTest* test)
         : Thread(Options("InterruptThread")), test_(test) {}
 
     virtual void Run() {
       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));
       action.sa_handler = SignalHandler;
       sigaction(SIGCHLD, &action, NULL);
 
       // Send signal
       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;
       test_->sem_.Signal();
     }
 
     static void SignalHandler(int signal) {
     }
 
    private:
@@ skipping 2166 matching lines @@
 
   {
     v8::HandleScope handle_scope(isolate);
 
     // Should work
     v8::Local<v8::Object> obj = v8::Object::New(isolate);
 
     USE(obj);
   }
 }