Allow eval/arguments in arrow functions

src/parser.h

Index: src/parser.h
diff --git a/src/parser.h b/src/parser.h
index 76fbac2a5643ada4b9a92b5b220843802d02eac4..c8c5835295eeb99c5df4600992958fcac2f50682 100644
--- a/src/parser.h
+++ b/src/parser.h
@@ -696,7 +696,6 @@ class ParserTraits {
   static Expression* EmptyExpression() {
     return NULL;
   }
-  static Expression* EmptyArrowParamList() { return NULL; }
   static Literal* EmptyLiteral() {
     return NULL;
   }
@@ -753,10 +752,13 @@ class ParserTraits {
   V8_INLINE Scope* NewScope(Scope* parent_scope, ScopeType scope_type,
                             FunctionKind kind = kNormalFunction);
 
-  // Utility functions
-  int DeclareArrowParametersFromExpression(Expression* expression, Scope* scope,
-                                           FormalParameterErrorLocations* locs,
-                                           bool* ok);
+  void RecordArrowFunctionParameter(ZoneList<const AstRawString*>* params,
+                                    VariableProxy* proxy,
+                                    FormalParameterErrorLocations* error_locs,
+                                    bool* ok);
+  ZoneList<const AstRawString*>* ParseArrowFunctionFormalParameterList(
+      Expression* params, const Scanner::Location& params_loc,
+      FormalParameterErrorLocations* error_locs, bool* is_rest, bool* ok);
 
   // Temporary glue; these functions will move to ParserBase.
   Expression* ParseV8Intrinsic(bool* ok);
@@ -777,6 +779,9 @@ class ParserTraits {
                                   bool name_is_strict_reserved, int pos,
                                   bool* ok);
 
+  int DeclareFormalParameters(ZoneList<const AstRawString*>* params,
+                              Scope* scope, bool has_rest);
+
   V8_INLINE void CheckConflictingVarDeclarations(v8::internal::Scope* scope,
                                                  bool* ok);
 
@@ -1053,8 +1058,6 @@ class Parser : public ParserBase<ParserTraits> {
   ScriptCompiler::CompileOptions compile_options_;
   ParseData* cached_parse_data_;
 
-  bool parsing_lazy_arrow_parameters_;  // for lazily parsed arrow functions.
-
   PendingCompilationErrorHandler pending_error_handler_;
 
   // Other information which will be stored in Parser and moved to Isolate after