Put back the asserts in RememberedSetHelper, but correct this time.

src/x64/full-codegen-x64.cc

Index: src/x64/full-codegen-x64.cc
===================================================================
--- src/x64/full-codegen-x64.cc	(revision 9343)
+++ src/x64/full-codegen-x64.cc	(working copy)
@@ -3036,10 +3036,16 @@
   // pauses in the middle of scanning a single object.  Therefore the
   // incremental marker is not disturbed, so we don't need to call the
   // RecordWrite stub that notifies the incremental marker.
-  __ RememberedSetHelper(
-      index_1, temp, kDontSaveFPRegs, MacroAssembler::kFallThroughAtEnd);
-  __ RememberedSetHelper(
-      index_2, temp, kDontSaveFPRegs, MacroAssembler::kFallThroughAtEnd);
+  __ RememberedSetHelper(elements,
+                         index_1,
+                         temp,
+                         kDontSaveFPRegs,
+                         MacroAssembler::kFallThroughAtEnd);
+  __ RememberedSetHelper(elements,
+                         index_2,
+                         temp,
+                         kDontSaveFPRegs,
+                         MacroAssembler::kFallThroughAtEnd);
 
   __ bind(&no_remembered_set);