Synchronize with r15594.

src/a64/lithium-codegen-a64.cc

Index: src/a64/lithium-codegen-a64.cc
diff --git a/src/a64/lithium-codegen-a64.cc b/src/a64/lithium-codegen-a64.cc
index 53019b8de874c1e1756ee8eedc69f25ddb7ecbe0..38f4a6271c92e268af6193e54a9922e73523f802 100644
--- a/src/a64/lithium-codegen-a64.cc
+++ b/src/a64/lithium-codegen-a64.cc
@@ -2799,18 +2799,6 @@ void LCodeGen::DoHasInstanceTypeAndBranch(LHasInstanceTypeAndBranch* instr) {
 }
 
 
-void LCodeGen::DoIn(LIn* instr) {
-  Register obj = ToRegister(instr->object());
-  Register key = ToRegister(instr->key());
-  __ Push(key, obj);
-  ASSERT(instr->HasPointerMap());
-  LPointerMap* pointers = instr->pointer_map();
-  RecordPosition(pointers->position());
-  SafepointGenerator safepoint_generator(this, pointers, Safepoint::kLazyDeopt);
-  __ InvokeBuiltin(Builtins::IN, CALL_FUNCTION, safepoint_generator);
-}
-
-
 void LCodeGen::DoInnerAllocatedObject(LInnerAllocatedObject* instr) {
   Register result = ToRegister(instr->result());
   Register base = ToRegister(instr->base_object());