X87: [runtime] Introduce FastNewStrictArgumentsStub to optimize strict arguments.

src/x87/builtins-x87.cc

Index: src/x87/builtins-x87.cc
diff --git a/src/x87/builtins-x87.cc b/src/x87/builtins-x87.cc
index 07fdbcbbe88bcb00b1d40e1410015b98b24f33c6..a56950296470dbd1e5e1e4999a4a9226cd5994eb 100644
--- a/src/x87/builtins-x87.cc
+++ b/src/x87/builtins-x87.cc
@@ -1883,9 +1883,7 @@ void Builtins::Generate_Apply(MacroAssembler* masm) {
 
     // Try to create the list from an arguments object.
     __ bind(&create_arguments);
-    __ mov(ebx,
-           FieldOperand(eax, JSObject::kHeaderSize +
-                                 Heap::kArgumentsLengthIndex * kPointerSize));
+    __ mov(ebx, FieldOperand(eax, JSArgumentsObject::kLengthOffset));
     __ mov(ecx, FieldOperand(eax, JSObject::kElementsOffset));
     __ cmp(ebx, FieldOperand(ecx, FixedArray::kLengthOffset));
     __ j(not_equal, &create_runtime);