[turbofan] Split JSGlobalObjectSpecialization into separate class.

src/compiler/pipeline.cc

Index: src/compiler/pipeline.cc
diff --git a/src/compiler/pipeline.cc b/src/compiler/pipeline.cc
index 86b5ae5fa5ddea2a7f581ee771d4c7da854b54f4..32319491fa02e6c878812f070903686d8b1b3a7b 100644
--- a/src/compiler/pipeline.cc
+++ b/src/compiler/pipeline.cc
@@ -31,6 +31,7 @@
 #include "src/compiler/js-context-specialization.h"
 #include "src/compiler/js-frame-specialization.h"
 #include "src/compiler/js-generic-lowering.h"
+#include "src/compiler/js-global-object-specialization.h"
 #include "src/compiler/js-inlining-heuristic.h"
 #include "src/compiler/js-intrinsic-lowering.h"
 #include "src/compiler/js-native-context-specialization.h"
@@ -500,15 +501,24 @@ struct NativeContextSpecializationPhase {
                                               data->common());
     CommonOperatorReducer common_reducer(&graph_reducer, data->graph(),
                                          data->common(), data->machine());
+    JSGlobalObjectSpecialization global_object_specialization(
+        &graph_reducer, data->jsgraph(),
+        data->info()->is_deoptimization_enabled()
+            ? JSGlobalObjectSpecialization::kDeoptimizationEnabled
+            : JSGlobalObjectSpecialization::kNoFlags,
+        handle(data->info()->global_object(), data->isolate()),
+        data->info()->dependencies());
     JSNativeContextSpecialization native_context_specialization(
         &graph_reducer, data->jsgraph(),
         data->info()->is_deoptimization_enabled()
             ? JSNativeContextSpecialization::kDeoptimizationEnabled
             : JSNativeContextSpecialization::kNoFlags,
-        handle(data->info()->global_object(), data->isolate()),
+        handle(data->info()->global_object()->native_context(),
+               data->isolate()),
         data->info()->dependencies(), temp_zone);
     AddReducer(data, &graph_reducer, &dead_code_elimination);
     AddReducer(data, &graph_reducer, &common_reducer);
+    AddReducer(data, &graph_reducer, &global_object_specialization);
     AddReducer(data, &graph_reducer, &native_context_specialization);
     graph_reducer.ReduceGraph();
   }