[profiler] use Sleep() on windows for long profile intervals.

See https://github.com/nodejs/diagnostics/issues/170

R=franzih@chromium.org

Change-Id: Iecc3bb27707b0d2afbb23fd9823d5cd4d725be6e
Reviewed-on: https://chromium-review.googlesource.com/931102Reviewed-by: Franziska Hinkelmann <franzih@chromium.org>
Commit-Queue: Yang Guo <yangguo@chromium.org>
Cr-Commit-Position: refs/heads/master@{#51466}

src/profiler/cpu-profiler.cc

@@ -165,9 +165,11 @@ void ProfilerEventsProcessor::Run() {
 
     if (nextSampleTime > now) {
 #if V8_OS_WIN
-      // Do not use Sleep on Windows as it is very imprecise.
-      // Could be up to 16ms jitter, which is unacceptable for the purpose.
-      while (base::TimeTicks::HighResolutionNow() < nextSampleTime) {
+      if (nextSampleTime - now < base::TimeDelta::FromMilliseconds(100)) {
+        // Do not use Sleep on Windows as it is very imprecise, with up to 16ms
+        // jitter, which is unacceptable for short profile intervals.
+        while (base::TimeTicks::HighResolutionNow() < nextSampleTime) {
+        }
       }
 #else
       base::OS::Sleep(nextSampleTime - now);