Remove RecordWriteStub from X64 and ARM platforms.

src/arm/codegen-arm.cc

Index: src/arm/codegen-arm.cc
===================================================================
--- src/arm/codegen-arm.cc	(revision 6127)
+++ src/arm/codegen-arm.cc	(working copy)
@@ -5618,12 +5618,10 @@
   // (or them and test against Smi mask.)
 
   __ mov(tmp2, tmp1);
-  RecordWriteStub recordWrite1(tmp1, index1, tmp3);
-  __ CallStub(&recordWrite1);
-
-  RecordWriteStub recordWrite2(tmp2, index2, tmp3);
-  __ CallStub(&recordWrite2);
-
+  __ add(index1, index1, tmp1);
+  __ add(index2, index2, tmp1);
+  __ RecordWriteHelper(tmp1, index1, tmp3);
+  __ RecordWriteHelper(tmp2, index2, tmp3);
   __ bind(&done);
 
   deferred->BindExit();