Use a different map to distinguish eval contexts

src/interpreter/interpreter.cc

Index: src/interpreter/interpreter.cc
diff --git a/src/interpreter/interpreter.cc b/src/interpreter/interpreter.cc
index a592c86a067e0a258219394db6bd9bb87cfae73c..7f3f76e0e3e54284da131cddbe3411bc566d3d77 100644
--- a/src/interpreter/interpreter.cc
+++ b/src/interpreter/interpreter.cc
@@ -2213,8 +2213,20 @@ void Interpreter::DoCreateFunctionContext(InterpreterAssembler* assembler) {
   Node* closure = __ LoadRegister(Register::function_closure());
   Node* slots = __ BytecodeOperandUImm(0);
   Node* context = __ GetContext();
-  __ SetAccumulator(
-      FastNewFunctionContextStub::Generate(assembler, closure, slots, context));
+  __ SetAccumulator(FastNewFunctionContextStub::Generate(
+      assembler, closure, slots, context, false));
+  __ Dispatch();
+}
+
+// CreateEvalContext <slots>
+//
+// Creates a new context with number of |slots| for an eval closure.
+void Interpreter::DoCreateEvalContext(InterpreterAssembler* assembler) {
+  Node* closure = __ LoadRegister(Register::function_closure());
+  Node* slots = __ BytecodeOperandUImm(0);
+  Node* context = __ GetContext();
+  __ SetAccumulator(FastNewFunctionContextStub::Generate(assembler, closure,
+                                                         slots, context, true));
   __ Dispatch();
 }