[modules] Implement namespace imports.

src/factory.h

 // 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.
 
 #ifndef V8_FACTORY_H_
 #define V8_FACTORY_H_
 
 #include "src/isolate.h"
 #include "src/messages.h"
 #include "src/type-feedback-vector.h"
@@ skipping 468 matching lines @@
   }
 
   void NewJSArrayStorage(
       Handle<JSArray> array,
       int length,
       int capacity,
       ArrayStorageAllocationMode mode = DONT_INITIALIZE_ARRAY_ELEMENTS);
 
   Handle<JSGeneratorObject> NewJSGeneratorObject(Handle<JSFunction> function);
 
+  Handle<JSModuleNamespace> NewJSModuleNamespace();
+
   Handle<Module> NewModule(Handle<SharedFunctionInfo> code);
 
   Handle<JSArrayBuffer> NewJSArrayBuffer(
       SharedFlag shared = SharedFlag::kNotShared,
       PretenureFlag pretenure = NOT_TENURED);
 
   Handle<JSTypedArray> NewJSTypedArray(ExternalArrayType type,
                                        PretenureFlag pretenure = NOT_TENURED);
 
   Handle<JSTypedArray> NewJSTypedArray(ElementsKind elements_kind,
@@ skipping 272 matching lines @@
                                      FunctionMode function_mode);
 
   void SetStrictFunctionInstanceDescriptor(Handle<Map> map,
                                            FunctionMode function_mode);
 };
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_FACTORY_H_