Track JS allocations as they arrive with no affection on performance when tracking is switched off

include/v8-profiler.h

Index: include/v8-profiler.h
diff --git a/include/v8-profiler.h b/include/v8-profiler.h
index 217a938329eee70f9483f8d84ef8654c59907a1d..b7833b1feffdfc151ed9980c7bb4b043662a49e9 100644
--- a/include/v8-profiler.h
+++ b/include/v8-profiler.h
@@ -473,6 +473,20 @@ class V8_EXPORT HeapProfiler {
    */
   void SetRetainedObjectInfo(UniqueId id, RetainedObjectInfo* info);
 
+  /**
+   * Starts recording JS allocations immediately as they arrive
+   * and tracking of heap objects population statistics.
+   */
+  void StartRecordingHeapAllocations();
+
+  /**
+   * Stops recording JS allocations and tracking of heap objects
+   * population statistics, cleans all collected heap objects
+   * population statistics data.
+   */
+  void StopRecordingHeapAllocations();
+
+
  private:
   HeapProfiler();
   ~HeapProfiler();