Push bleeding_edge revisions 2004 and 2006 to trunk....

src/top.h

 // Copyright 2006-2008 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 237 matching lines @@
   // a builtin object, or a js global object.
   static Handle<GlobalObject> global() {
     return Handle<GlobalObject>(context()->global());
   }
 
   // Returns the global proxy object of the current context.
   static Object* global_proxy() {
     return context()->global_proxy();
   }
 
+  // Returns the current global context.
   static Handle<Context> global_context();
 
+  // Returns the global context of the calling JavaScript code.  That
+  // is, the global context of the top-most JavaScript frame.
+  static Handle<Context> GetCallingGlobalContext();
+
   static Handle<JSBuiltinsObject> builtins() {
     return Handle<JSBuiltinsObject>(thread_local_.context_->builtins());
   }
 
   static Object* LookupSpecialFunction(JSObject* receiver,
                                        JSObject* prototype,
                                        JSFunction* value);
 
   static void RegisterTryCatchHandler(v8::TryCatch* that);
   static void UnregisterTryCatchHandler(v8::TryCatch* that);
@@ skipping 98 matching lines @@
 
 class ExecutionAccess BASE_EMBEDDED {
  public:
   ExecutionAccess();
   ~ExecutionAccess();
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_TOP_H_