Fix lazy deopt after tagged binary ops

src/x64/lithium-x64.h

Index: src/x64/lithium-x64.h
diff --git a/src/x64/lithium-x64.h b/src/x64/lithium-x64.h
index 268940cb0ad1622aa4a4ea2a7f16ae98999396e0..c54ab5c8ce0a0aa52ee556c3f03fcb7ef02fd6ff 100644
--- a/src/x64/lithium-x64.h
+++ b/src/x64/lithium-x64.h
@@ -2667,8 +2667,7 @@ class LChunkBuilder V8_FINAL : public LChunkBuilderBase {
         current_block_(NULL),
         next_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();
@@ -2814,7 +2813,6 @@ class LChunkBuilder V8_FINAL : public LChunkBuilderBase {
   HBasicBlock* next_block_;
   LAllocator* allocator_;
   LInstruction* instruction_pending_deoptimization_environment_;
-  BailoutId pending_deoptimization_ast_id_;
 
   DISALLOW_COPY_AND_ASSIGN(LChunkBuilder);
 };