Fix packed-element.js test on ARM with no snap

R=mstarzinger@chromium.org

Review URL: https://chromiumcodereview.appspot.com/10546171

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@11826 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/arm/macro-assembler-arm.cc

@@ -2878,7 +2878,8 @@ void MacroAssembler::LoadTransitionedArrayMapConditional(
                  Context::SlotOffset(Context::JS_ARRAY_MAPS_INDEX)));
   size_t offset = expected_kind * kPointerSize +
       FixedArrayBase::kHeaderSize;
-  cmp(map_in_out, scratch);
+  ldr(ip, FieldMemOperand(scratch, offset));
+  cmp(map_in_out, ip);
   b(ne, no_map_match);
 
   // Use the transitioned cached map.