Add CollectSample API function to CpuProfiler

include/v8-profiler.h

Index: include/v8-profiler.h
diff --git a/include/v8-profiler.h b/include/v8-profiler.h
index a991aa059d18b4d70e35e1e3da8b46183598c86b..007ae2eca55e411981171e3a34396f06f5b0236e 100644
--- a/include/v8-profiler.h
+++ b/include/v8-profiler.h
@@ -207,6 +207,13 @@ class V8_EXPORT CpuProfiler {
   CpuProfile* StopProfiling(Local<String> title);
 
   /**
+   * Force collection of a sample. Must be called on the VM thread.
+   * Recording the forced sample does not contribute to the aggregated
+   * profile statistics.
+   */
+  void CollectSample();
+
+  /**
    * Tells the profiler whether the embedder is idle.
    */
   void SetIdle(bool is_idle);