[debugger] step-next across yield should not leave the generator.

src/debug/debug.h

Index: src/debug/debug.h
diff --git a/src/debug/debug.h b/src/debug/debug.h
index 6e49db6ebd0256fb9899ef08646b74f6800adac6..3e63ec94363025f431fcdd3d9d3b13517a5a5058 100644
--- a/src/debug/debug.h
+++ b/src/debug/debug.h
@@ -464,7 +464,7 @@ class Debug {
   bool GetPossibleBreakpoints(Handle<Script> script, int start_position,
                               int end_position, std::set<int>* positions);
 
-  void RecordAsyncFunction(Handle<JSGeneratorObject> generator_object);
+  void RecordGenerator(Handle<JSGeneratorObject> generator_object);
 
   // Returns whether the operation succeeded. Compilation can only be triggered
   // if a valid closure is passed as the second argument, otherwise the shared