Fix bug in constant folding object comparisons.

src/hydrogen-instructions.cc

Index: src/hydrogen-instructions.cc
diff --git a/src/hydrogen-instructions.cc b/src/hydrogen-instructions.cc
index 79c7964d15492ead5d3312a5ef53ad82770c1154..ba8d03b6f6f8f04839fee8c07dbfcc9a1c33943c 100644
--- a/src/hydrogen-instructions.cc
+++ b/src/hydrogen-instructions.cc
@@ -3056,7 +3056,7 @@ void HCompareObjectEqAndBranch::PrintDataTo(StringStream* stream) {
 
 bool HCompareObjectEqAndBranch::KnownSuccessorBlock(HBasicBlock** block) {
   if (FLAG_fold_constants && left()->IsConstant() && right()->IsConstant()) {
-    *block = HConstant::cast(left())->Equals(HConstant::cast(right()))
+    *block = HConstant::cast(left())->DataEquals(HConstant::cast(right()))
         ? FirstSuccessor() : SecondSuccessor();
     return true;
   }