[debugger] add precise mode for code coverage.

src/objects.h

Index: src/objects.h
diff --git a/src/objects.h b/src/objects.h
index f72f7b0001ab7a1d792a02948fec29a0441867f7..08268c645f2a5f791343482ef609fd8a317acab8 100644
--- a/src/objects.h
+++ b/src/objects.h
@@ -3029,6 +3029,7 @@ class ArrayList : public FixedArray {
                                AddMode mode = kNone);
   static Handle<ArrayList> Add(Handle<ArrayList> array, Handle<Object> obj1,
                                Handle<Object> obj2, AddMode = kNone);
+  static Handle<ArrayList> New(Isolate* isolate, int size);
   inline int Length();
   inline void SetLength(int length);
   inline Object* Get(int index);