Only create arguments-maps in the bootstrapper, remove now obsolete ValueType flag.

src/heap.cc

Index: src/heap.cc
diff --git a/src/heap.cc b/src/heap.cc
index d390788d261cd479bec9a1cd4df0d6d22f0fe283..2fa7702db07192dc18e976ead0ee29b441e38bce 100644
--- a/src/heap.cc
+++ b/src/heap.cc
@@ -3569,58 +3569,6 @@ AllocationResult Heap::Allocate(Map* map, AllocationSpace space,
 }
 
 
-AllocationResult Heap::AllocateArgumentsObject(Object* callee, int length) {
-  // To get fast allocation and map sharing for arguments objects we
-  // allocate them based on an arguments boilerplate.
-
-  JSObject* boilerplate;
-  int arguments_object_size;
-  bool strict_mode_callee = callee->IsJSFunction() &&
-      JSFunction::cast(callee)->shared()->strict_mode() == STRICT;
-  if (strict_mode_callee) {
-    boilerplate =
-        isolate()->context()->native_context()->strict_arguments_boilerplate();
-    arguments_object_size = kStrictArgumentsObjectSize;
-  } else {
-    boilerplate =
-        isolate()->context()->native_context()->sloppy_arguments_boilerplate();
-    arguments_object_size = kSloppyArgumentsObjectSize;
-  }
-
-  // Check that the size of the boilerplate matches our
-  // expectations. The ArgumentsAccessStub::GenerateNewObject relies
-  // on the size being a known constant.
-  ASSERT(arguments_object_size == boilerplate->map()->instance_size());
-
-  // Do the allocation.
-  HeapObject* result;
-  { AllocationResult allocation =
-        AllocateRaw(arguments_object_size, NEW_SPACE, OLD_POINTER_SPACE);
-    if (!allocation.To(&result)) return allocation;
-  }
-
-  // Copy the content. The arguments boilerplate doesn't have any
-  // fields that point to new space so it's safe to skip the write
-  // barrier here.
-  CopyBlock(result->address(), boilerplate->address(), JSObject::kHeaderSize);
-
-  // Set the length property.
-  JSObject* js_obj = JSObject::cast(result);
-  js_obj->InObjectPropertyAtPut(
-      kArgumentsLengthIndex, Smi::FromInt(length), SKIP_WRITE_BARRIER);
-  // Set the callee property for sloppy mode arguments object only.
-  if (!strict_mode_callee) {
-    js_obj->InObjectPropertyAtPut(kArgumentsCalleeIndex, callee);
-  }
-
-  // Check the state of the object
-  ASSERT(js_obj->HasFastProperties());
-  ASSERT(js_obj->HasFastObjectElements());
-
-  return js_obj;
-}
-
-
 void Heap::InitializeJSObjectFromMap(JSObject* obj,
                                      FixedArray* properties,
                                      Map* map) {