Keep two empty lines between declarations for cpp files

src/extensions/i18n/collator.cc

Index: src/extensions/i18n/collator.cc
===================================================================
--- src/extensions/i18n/collator.cc	(revision 15486)
+++ src/extensions/i18n/collator.cc	(working copy)
@@ -76,6 +76,7 @@
   object->Dispose(isolate);
 }
 
+
 // Throws a JavaScript exception.
 static v8::Handle<v8::Value> ThrowUnexpectedObjectError() {
   // Returns undefined, and schedules an exception to be thrown.
@@ -84,11 +85,13 @@
                       "that is not a Collator.")));
 }
 
+
 // When there's an ICU error, throw a JavaScript error with |message|.
 static v8::Handle<v8::Value> ThrowExceptionForICUError(const char* message) {
   return v8::ThrowException(v8::Exception::Error(v8::String::New(message)));
 }
 
+
 // static
 void Collator::JSInternalCompare(
     const v8::FunctionCallbackInfo<v8::Value>& args) {