Keep two empty lines between declarations for cpp files

src/extensions/i18n/i18n-extension.cc

 // Copyright 2013 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 90 matching lines @@
     return v8::FunctionTemplate::New(
         BreakIterator::JSInternalBreakIteratorCurrent);
   } else if (name->Equals(v8::String::New("NativeJSBreakIteratorBreakType"))) {
     return v8::FunctionTemplate::New(
         BreakIterator::JSInternalBreakIteratorBreakType);
   }
 
   return v8::Handle<v8::FunctionTemplate>();
 }
 
+
 void Extension::Register() {
   static Extension i18n_extension;
   static v8::DeclareExtension extension_declaration(&i18n_extension);
 }
 
 }  // namespace v8_i18n