[parser] improve inferred function names for async arrow functions

src/parsing/func-name-inferrer.cc

Index: src/parsing/func-name-inferrer.cc
diff --git a/src/parsing/func-name-inferrer.cc b/src/parsing/func-name-inferrer.cc
index 12013afd282bec18a947c21a167b9b9f0452ac27..1a0a690a04dfb1597a6d55ebd9eba1306334f74c 100644
--- a/src/parsing/func-name-inferrer.cc
+++ b/src/parsing/func-name-inferrer.cc
@@ -20,7 +20,6 @@ FuncNameInferrer::FuncNameInferrer(AstValueFactory* ast_value_factory,
       zone_(zone) {
 }
 
-

[Dan Ehrenberg, 2016/08/12 21:29:58]

Nit: Revert irrelevant whitespace change.

 void FuncNameInferrer::PushEnclosingName(const AstRawString* name) {
   // Enclosing name is a name of a constructor function. To check
   // that it is really a constructor, we check that it is not empty
@@ -44,6 +43,12 @@ void FuncNameInferrer::PushVariableName(const AstRawString* name) {
   }
 }
 
+void FuncNameInferrer::RemoveAsyncKeywordAtIndex(int index) {
+  DCHECK(index >= 0);
+  DCHECK(index < names_stack_.length());
+  DCHECK(names_stack_.at(index).name->IsOneByteEqualTo("async"));
+  names_stack_.Remove(index);
+}
 
 const AstString* FuncNameInferrer::MakeNameFromStack() {
   return MakeNameFromStackHelper(0, ast_value_factory_->empty_string());