Various extension-related cleanup and simplifications.

include/v8.h

 // Copyright 2012 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 3700 matching lines @@
 
   // Disallow copying and assigning.
   Extension(const Extension&);
   void operator=(const Extension&);
 };
 
 
 void V8_EXPORT RegisterExtension(Extension* extension);
 
 
-/**
- * Ignore
- */
-class V8_EXPORT DeclareExtension {
- public:
-  V8_INLINE DeclareExtension(Extension* extension) {
-    RegisterExtension(extension);
-  }
-};
-
-
 // --- Statics ---
 
 V8_INLINE Handle<Primitive> Undefined(Isolate* isolate);
 V8_INLINE Handle<Primitive> Null(Isolate* isolate);
 V8_INLINE Handle<Boolean> True(Isolate* isolate);
 V8_INLINE Handle<Boolean> False(Isolate* isolate);
 
 
 /**
  * A set of constraints that specifies the limits of the runtime's memory use.
@@ skipping 2693 matching lines @@
  */
 
 
 }  // namespace v8
 
 
 #undef TYPE_CHECK
 
 
 #endif  // V8_H_