Add a stub for allocating parameter maps.

src/code-stubs.h

Index: src/code-stubs.h
===================================================================
--- src/code-stubs.h	(revision 7540)
+++ src/code-stubs.h	(working copy)
@@ -668,7 +668,8 @@
  public:
   enum Type {
     READ_ELEMENT,
-    NEW_NON_STRICT,
+    NEW_NON_STRICT_FAST,
+    NEW_NON_STRICT_SLOW,
     NEW_STRICT
   };
 
@@ -682,21 +683,10 @@
 
   void Generate(MacroAssembler* masm);
   void GenerateReadElement(MacroAssembler* masm);
-  void GenerateNewObject(MacroAssembler* masm);
+  void GenerateNewStrict(MacroAssembler* masm);
+  void GenerateNewNonStrictFast(MacroAssembler* masm);
+  void GenerateNewNonStrictSlow(MacroAssembler* masm);
 
-  int GetArgumentsBoilerplateIndex() const {
-  return (type_ == NEW_STRICT)
-      ? Context::STRICT_MODE_ARGUMENTS_BOILERPLATE_INDEX
-      : Context::ARGUMENTS_BOILERPLATE_INDEX;
-  }
-
-  int GetArgumentsObjectSize() const {
-    if (type_ == NEW_STRICT)
-      return Heap::kArgumentsObjectSizeStrict;
-    else
-      return Heap::kArgumentsObjectSize;
-  }
-
   const char* GetName() { return "ArgumentsAccessStub"; }
 
 #ifdef DEBUG