Add support for CPU and heap profiles deletion.

src/heap-profiler.h

Index: src/heap-profiler.h
diff --git a/src/heap-profiler.h b/src/heap-profiler.h
index b425635da01c2fbc84b7cc78add84526f47a3cc2..89a2e8a508aecd1d5ec010d54723442cd594a67d 100644
--- a/src/heap-profiler.h
+++ b/src/heap-profiler.h
@@ -67,6 +67,7 @@ class HeapProfiler {
   static int GetSnapshotsCount();
   static HeapSnapshot* GetSnapshot(int index);
   static HeapSnapshot* FindSnapshot(unsigned uid);
+  static void DeleteAllSnapshots();
 
   void ObjectMoveEvent(Address from, Address to);
 
@@ -92,6 +93,7 @@ class HeapProfiler {
   HeapSnapshot* TakeSnapshotImpl(String* name,
                                  int type,
                                  v8::ActivityControl* control);
+  void ResetSnapshots();
 
   HeapSnapshotsCollection* snapshots_;
   unsigned next_snapshot_uid_;