Keep two empty lines between declarations for cpp files

src/preparse-data.cc

 // Copyright 2010 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 68 matching lines @@
 }
 
 
 void FunctionLoggingParserRecorder::WriteString(Vector<const char> str) {
   function_store_.Add(str.length());
   for (int i = 0; i < str.length(); i++) {
     function_store_.Add(str[i]);
   }
 }
 
+
 // ----------------------------------------------------------------------------
 // PartialParserRecorder -  Record both function entries and symbols.
 
 Vector<unsigned> PartialParserRecorder::ExtractData() {
   int function_size = function_store_.size();
   int total_size = PreparseDataConstants::kHeaderSize + function_size;
   Vector<unsigned> data = Vector<unsigned>::New(total_size);
   preamble_[PreparseDataConstants::kFunctionsSizeOffset] = function_size;
   preamble_[PreparseDataConstants::kSymbolCountOffset] = 0;
   OS::MemCopy(data.start(), preamble_, sizeof(preamble_));
@@ skipping 75 matching lines @@
       symbol_store_.Add(static_cast<byte>(number >> i) | 0x80u);
       number &= mask;
     }
     mask >>= 7;
   }
   symbol_store_.Add(static_cast<byte>(number));
 }
 
 
 } }  // namespace v8::internal.