Synchronize with r15594.

src/a64/lithium-a64.h

Index: src/a64/lithium-a64.h
diff --git a/src/a64/lithium-a64.h b/src/a64/lithium-a64.h
index b8d7b977a627ffd43d81d5a40f8ad1ce8f8e4567..20d9cc23c4832dafca3402802df4629c3b12e3d3 100644
--- a/src/a64/lithium-a64.h
+++ b/src/a64/lithium-a64.h
@@ -108,7 +108,6 @@ class LCodeGen;
   V(Goto)                                       \
   V(HasCachedArrayIndexAndBranch)               \
   V(HasInstanceTypeAndBranch)                   \
-  V(In)                                         \
   V(InnerAllocatedObject)                       \
   V(InstanceOf)                                 \
   V(InstanceOfKnownGlobal)                      \
@@ -1379,20 +1378,6 @@ class LHasInstanceTypeAndBranch: public LControlInstruction<1, 1> {
 };
 
 
-class LIn: public LTemplateInstruction<1, 2, 0> {
- public:
-  LIn(LOperand* key, LOperand* object) {
-    inputs_[0] = key;
-    inputs_[1] = object;
-  }
-
-  LOperand* key() { return inputs_[0]; }
-  LOperand* object() { return inputs_[1]; }
-
-  DECLARE_CONCRETE_INSTRUCTION(In, "in")
-};
-
-
 class LInnerAllocatedObject: public LTemplateInstruction<1, 1, 0> {
  public:
   explicit LInnerAllocatedObject(LOperand* base_object) {