Make CPU profiler do not hog 100% of CPU.

src/optimizing-compile-dispatcher.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/optimizing-compile-dispatcher.h"
 
 #include "src/v8.h"
 
 #include "src/base/atomicops.h"
 #include "src/full-codegen.h"
@@ skipping 45 matching lines @@
     DisallowHeapAllocation no_allocation;
     DisallowHandleAllocation no_handles;
     DisallowHandleDereference no_deref;
 
     OptimizingCompileDispatcher* dispatcher =
         isolate_->optimizing_compile_dispatcher();
     {
       TimerEventScope<TimerEventRecompileConcurrent> timer(isolate_);
 
       if (dispatcher->recompilation_delay_ != 0) {
-        base::OS::Sleep(dispatcher->recompilation_delay_);
+        base::OS::Sleep(base::TimeDelta::FromMilliseconds(
+            dispatcher->recompilation_delay_));
       }
 
       dispatcher->CompileNext(dispatcher->NextInput(true));
     }
     {
       base::LockGuard<base::Mutex> lock_guard(&dispatcher->ref_count_mutex_);
       if (--dispatcher->ref_count_ == 0) {
         dispatcher->ref_count_zero_.NotifyOne();
       }
     }
@@ skipping 273 matching lines @@
       info->closure()->PrintName();
       PrintF(", AST id %d]\n", info->osr_ast_id().ToInt());
     }
     DisposeOptimizedCompileJob(stale, false);
   }
   osr_buffer_[osr_buffer_cursor_] = job;
   osr_buffer_cursor_ = (osr_buffer_cursor_ + 1) % osr_buffer_capacity_;
 }
 }
 }  // namespace v8::internal