Fix approximation of CanDeoptimize() and other small store elimination fixes.

src/hydrogen-store-elimination.cc

 // Copyright 2013 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 111 matching lines @@
   if (instr->CanDeoptimize()) {
     TRACE(("-- Observed stores at I%d (might deoptimize)\n", instr->id()));
     unobserved_.Rewind(0);
     return;
   }
   if (instr->CheckChangesFlag(kNewSpacePromotion)) {
     TRACE(("-- Observed stores at I%d (might GC)\n", instr->id()));
     unobserved_.Rewind(0);
     return;
   }
-  if (instr->ChangesFlags().ContainsAnyOf(flags)) {
+  if (instr->DependsOnFlags().ContainsAnyOf(flags)) {
     TRACE(("-- Observed stores at I%d (GVN flags)\n", instr->id()));
     unobserved_.Rewind(0);
     return;
   }
 }
 
 } }  // namespace v8::internal