Add script context with context-allocated "const this"

src/objects.h

 // Copyright 2012 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_OBJECTS_H_
 #define V8_OBJECTS_H_
 
 #include <iosfwd>
 
 #include "src/allocation.h"
@@ skipping 4070 matching lines @@
   bool block_scope_is_class_scope();
   FunctionKind function_kind();
 
   // Copies all the context locals into an object used to materialize a scope.
   static bool CopyContextLocalsToScopeObject(Handle<ScopeInfo> scope_info,
                                              Handle<Context> context,
                                              Handle<JSObject> scope_object);
 
 
   static Handle<ScopeInfo> Create(Isolate* isolate, Zone* zone, Scope* scope);
+  static Handle<ScopeInfo> CreateGlobalThisBinding(Isolate* isolate);
 
   // Serializes empty scope info.
   static ScopeInfo* Empty(Isolate* isolate);
 
 #ifdef DEBUG
   void Print();
 #endif
 
   // The layout of the static part of a ScopeInfo is as follows. Each entry is
   // numeric and occupies one array slot.
@@ skipping 6778 matching lines @@
     } else {
       value &= ~(1 << bit_position);
     }
     return value;
   }
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_OBJECTS_H_