Fix lazy deopt after tagged binary ops

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 9550d2226a57109c2acf5375e439e7fe484a4d67..873ed95a1aabccc8f0d33530b5e3c618f8ca13db 100644
--- a/src/a64/lithium-a64.h
+++ b/src/a64/lithium-a64.h
@@ -2977,8 +2977,7 @@ class LChunkBuilder V8_FINAL : public LChunkBuilderBase {
         current_instruction_(NULL),
         current_block_(NULL),
         allocator_(allocator),
-        instruction_pending_deoptimization_environment_(NULL),
-        pending_deoptimization_ast_id_(BailoutId::None()) { }
+        instruction_pending_deoptimization_environment_(NULL) { }
 
   // Build the sequence for the graph.
   LPlatformChunk* Build();
@@ -3116,7 +3115,6 @@ class LChunkBuilder V8_FINAL : public LChunkBuilderBase {
   HBasicBlock* current_block_;
   LAllocator* allocator_;
   LInstruction* instruction_pending_deoptimization_environment_;
-  BailoutId pending_deoptimization_ast_id_;
 
   DISALLOW_COPY_AND_ASSIGN(LChunkBuilder);
 };