Use weak cells to embed maps in store handler.

src/arm/macro-assembler-arm.h

Index: src/arm/macro-assembler-arm.h
diff --git a/src/arm/macro-assembler-arm.h b/src/arm/macro-assembler-arm.h
index 8e1c1127b8fcdccb2cb4b012a1db97f61c6a8d49..65f77fb69ffa2e9a70099a7767c270bee46f5235 100644
--- a/src/arm/macro-assembler-arm.h
+++ b/src/arm/macro-assembler-arm.h
@@ -200,10 +200,6 @@ class MacroAssembler: public Assembler {
                      Condition cc,
                      Label* condition_met);
 
-  void CheckMapDeprecated(Handle<Map> map,
-                          Register scratch,
-                          Label* if_deprecated);
-
   // Check if object is in new space.  Jumps if the object is not in new space.
   // The register scratch can be object itself, but scratch will be clobbered.
   void JumpIfNotInNewSpace(Register object,