Keep two empty lines between declarations for cpp files

src/preparser.cc

 // Copyright 2011 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 1667 matching lines @@
   if (!*ok) return Identifier::Default();
   if (scanner_->is_literal_ascii() &&
       scanner_->literal_length() == 3) {
     const char* token = scanner_->literal_ascii_string().start();
     *is_get = strncmp(token, "get", 3) == 0;
     *is_set = !*is_get && strncmp(token, "set", 3) == 0;
   }
   return result;
 }
 
+
 bool PreParser::peek_any_identifier() {
   i::Token::Value next = peek();
   return next == i::Token::IDENTIFIER ||
          next == i::Token::FUTURE_RESERVED_WORD ||
          next == i::Token::FUTURE_STRICT_RESERVED_WORD ||
          next == i::Token::YIELD;
 }
 
 
 int DuplicateFinder::AddAsciiSymbol(i::Vector<const char> key, int value) {
   return AddSymbol(i::Vector<const byte>::cast(key), true, value);
 }
 
+
 int DuplicateFinder::AddUtf16Symbol(i::Vector<const uint16_t> key, int value) {
   return AddSymbol(i::Vector<const byte>::cast(key), false, value);
 }
 
 int DuplicateFinder::AddSymbol(i::Vector<const byte> key,
                                bool is_ascii,
                                int value) {
   uint32_t hash = Hash(key, is_ascii);
   byte* encoding = BackupKey(key, is_ascii);
   i::HashMap::Entry* entry = map_.Lookup(encoding, hash, true);
@@ skipping 109 matching lines @@
       backing_store_.Add(static_cast<byte>((ascii_length >> 14) | 0x80u));
     }
     backing_store_.Add(static_cast<byte>((ascii_length >> 7) | 0x80u));
   }
   backing_store_.Add(static_cast<byte>(ascii_length & 0x7f));
 
   backing_store_.AddBlock(bytes);
   return backing_store_.EndSequence().start();
 }
 } }  // v8::preparser