Keep two empty lines between declarations for cpp files

src/d8.cc

 // 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 1069 matching lines @@
                                    uint8_t* data) {
   size_t byte_length =
       Local<ArrayBuffer>::New(isolate, *array_buffer)->ByteLength();
   isolate->AdjustAmountOfExternalAllocatedMemory(
       -static_cast<intptr_t>(byte_length));
 
   delete[] data;
   array_buffer->Dispose();
 }
 
+
 void Shell::ReadBuffer(const v8::FunctionCallbackInfo<v8::Value>& args) {
   ASSERT(sizeof(char) == sizeof(uint8_t));  // NOLINT
   String::Utf8Value filename(args[0]);
   int length;
   if (*filename == NULL) {
     Throw("Error loading file");
     return;
   }
 
   Isolate* isolate = args.GetIsolate();
@@ skipping 557 matching lines @@
 }
 
 }  // namespace v8
 
 
 #ifndef GOOGLE3
 int main(int argc, char* argv[]) {
   return v8::Shell::Main(argc, argv);
 }
 #endif