Handle overwriting valueOf on String objects correctly when adding...

src/arm/codegen-arm.h

Index: src/arm/codegen-arm.h
===================================================================
--- src/arm/codegen-arm.h	(revision 5232)
+++ src/arm/codegen-arm.h	(working copy)
@@ -286,6 +286,10 @@
     return inlined_write_barrier_size_ + 4;
   }
 
+  static MemOperand ContextOperand(Register context, int index) {
+    return MemOperand(context, Context::SlotOffset(index));
+  }
+
  private:
   // Construction/Destruction
   explicit CodeGenerator(MacroAssembler* masm);
@@ -338,10 +342,6 @@
   void LoadReference(Reference* ref);
   void UnloadReference(Reference* ref);
 
-  static MemOperand ContextOperand(Register context, int index) {
-    return MemOperand(context, Context::SlotOffset(index));
-  }
-
   MemOperand SlotOperand(Slot* slot, Register tmp);
 
   MemOperand ContextSlotOperandCheckExtensions(Slot* slot,
@@ -482,6 +482,8 @@
   void GenerateIsSpecObject(ZoneList<Expression*>* args);
   void GenerateIsFunction(ZoneList<Expression*>* args);
   void GenerateIsUndetectableObject(ZoneList<Expression*>* args);
+  void GenerateIsStringWrapperSafeForDefaultValueOf(
+      ZoneList<Expression*>* args);
 
   // Support for construct call checks.
   void GenerateIsConstructCall(ZoneList<Expression*>* args);