Revert r14930 and r14935 temporarily.

src/x64/lithium-x64.cc

Index: src/x64/lithium-x64.cc
diff --git a/src/x64/lithium-x64.cc b/src/x64/lithium-x64.cc
index 980cb2112825a5d2969a1ea024120946efbf3c72..b1bc5479bd889adad729cfb1d50e59004b87ad23 100644
--- a/src/x64/lithium-x64.cc
+++ b/src/x64/lithium-x64.cc
@@ -2357,6 +2357,13 @@ LInstruction* LChunkBuilder::DoStringLength(HStringLength* instr) {
 }
 
 
+LInstruction* LChunkBuilder::DoAllocateObject(HAllocateObject* instr) {
+  info()->MarkAsDeferredCalling();
+  LAllocateObject* result = new(zone()) LAllocateObject(TempRegister());
+  return AssignPointerMap(DefineAsRegister(result));
+}
+
+
 LInstruction* LChunkBuilder::DoAllocate(HAllocate* instr) {
   info()->MarkAsDeferredCalling();
   LOperand* size = instr->size()->IsConstant()