Keep two empty lines between declarations for cpp files

src/types.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 300 matching lines @@
 
 bool Type::InUnion(Handle<Unioned> unioned, int current_size) {
   ASSERT(!this->is_union());
   for (int i = 0; i < current_size; ++i) {
     Handle<Type> type = union_get(unioned, i);
     if (this->Is(type)) return true;
   }
   return false;
 }
 
+
 // Get non-bitsets from this which are not subsumed by union, store at unioned,
 // starting at index. Returns updated index.
 int Type::ExtendUnion(Handle<Unioned> result, int current_size) {
   int old_size = current_size;
   if (this->is_class() || this->is_constant()) {
     if (!this->InUnion(result, old_size)) result->set(current_size++, this);
   } else if (this->is_union()) {
     Handle<Unioned> unioned = this->as_union();
     for (int i = 0; i < unioned->length(); ++i) {
       Handle<Type> type = union_get(unioned, i);
@@ skipping 139 matching lines @@
 }
 
 
 Type* Type::Optional(Handle<Type> type) {
   return type->is_bitset()
       ? from_bitset(type->as_bitset() | kUndefined)
       : Union(type, Undefined()->handle_via_isolate_of(*type));
 }
 
 } }  // namespace v8::internal