[compiler] Delete extra map check in StringIterator.

src/compiler/pipeline.cc

 // Copyright 2014 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/compiler/pipeline.h"
 
 #include <fstream>  // NOLINT(readability/streams)
 #include <memory>
 #include <sstream>
 
@@ skipping 900 matching lines @@
 
   void Run(PipelineData* data, Zone* temp_zone) {
     JSGraphReducer graph_reducer(data->jsgraph(), temp_zone);
     DeadCodeElimination dead_code_elimination(&graph_reducer, data->graph(),
                                               data->common());
     JSBuiltinReducer builtin_reducer(
         &graph_reducer, data->jsgraph(),
         data->info()->is_deoptimization_enabled()
             ? JSBuiltinReducer::kDeoptimizationEnabled
             : JSBuiltinReducer::kNoFlags,
-        data->info()->dependencies());
+        data->info()->dependencies(), data->native_context());
     Handle<LiteralsArray> literals_array(data->info()->closure()->literals());
     JSCreateLowering create_lowering(
         &graph_reducer, data->info()->dependencies(), data->jsgraph(),
         literals_array, data->native_context(), temp_zone);
     JSTypedLowering::Flags typed_lowering_flags = JSTypedLowering::kNoFlags;
     if (data->info()->is_deoptimization_enabled()) {
       typed_lowering_flags |= JSTypedLowering::kDeoptimizationEnabled;
     }
     JSTypedLowering typed_lowering(&graph_reducer, data->info()->dependencies(),
                                    typed_lowering_flags, data->jsgraph(),
@@ skipping 1063 matching lines @@
   data->DeleteRegisterAllocationZone();
 }
 
 CompilationInfo* PipelineImpl::info() const { return data_->info(); }
 
 Isolate* PipelineImpl::isolate() const { return info()->isolate(); }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8