[turbofan] Enforce native context specialization.

src/compiler/js-create-lowering.h

 // Copyright 2016 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.
 
 #ifndef V8_COMPILER_JS_CREATE_LOWERING_H_
 #define V8_COMPILER_JS_CREATE_LOWERING_H_
 
 #include "src/compiler/graph-reducer.h"
 
 namespace v8 {
@@ skipping 13 matching lines @@
 class JSOperatorBuilder;
 class MachineOperatorBuilder;
 class SimplifiedOperatorBuilder;
 
 
 // Lowers JSCreate-level operators to fast (inline) allocations.
 class JSCreateLowering final : public AdvancedReducer {
  public:
   JSCreateLowering(Editor* editor, CompilationDependencies* dependencies,
                    JSGraph* jsgraph, MaybeHandle<LiteralsArray> literals_array,
-                   MaybeHandle<Context> native_context, Zone* zone)
+                   Handle<Context> native_context, Zone* zone)
       : AdvancedReducer(editor),
         dependencies_(dependencies),
         jsgraph_(jsgraph),
         literals_array_(literals_array),
         native_context_(native_context),
         zone_(zone) {}
   ~JSCreateLowering() final {}
 
   Reduction Reduce(Node* node) final;
 
@@ skipping 25 matching lines @@
                             AllocationSiteUsageContext* site_context);
   Node* AllocateFastLiteralElements(Node* effect, Node* control,
                                     Handle<JSObject> boilerplate,
                                     PretenureFlag pretenure,
                                     AllocationSiteUsageContext* site_context);
 
   Reduction ReduceNewArrayToStubCall(Node* node, Handle<AllocationSite> site);
 
   // Infers the LiteralsArray to use for a given {node}.
   MaybeHandle<LiteralsArray> GetSpecializationLiterals(Node* node);
-  // Infers the native context to use for a given {node}.
-  MaybeHandle<Context> GetSpecializationNativeContext(Node* node);
 
   Factory* factory() const;
   Graph* graph() const;
   JSGraph* jsgraph() const { return jsgraph_; }
   Isolate* isolate() const;
+  Handle<Context> native_context() const { return native_context_; }
   JSOperatorBuilder* javascript() const;
   CommonOperatorBuilder* common() const;
   SimplifiedOperatorBuilder* simplified() const;
   MachineOperatorBuilder* machine() const;
   CompilationDependencies* dependencies() const { return dependencies_; }
   Zone* zone() const { return zone_; }
 
   CompilationDependencies* const dependencies_;
   JSGraph* const jsgraph_;
   MaybeHandle<LiteralsArray> const literals_array_;
-  MaybeHandle<Context> const native_context_;
+  Handle<Context> const native_context_;
   Zone* const zone_;
 };
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COMPILER_JS_CREATE_LOWERING_H_