Keep two empty lines between declarations for cpp files

src/full-codegen.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 58 matching lines @@
 }
 
 void BreakableStatementChecker::VisitExportDeclaration(
     ExportDeclaration* decl) {
 }
 
 
 void BreakableStatementChecker::VisitModuleLiteral(ModuleLiteral* module) {
 }
 
+
 void BreakableStatementChecker::VisitModuleVariable(ModuleVariable* module) {
 }
 
+
 void BreakableStatementChecker::VisitModulePath(ModulePath* module) {
 }
 
+
 void BreakableStatementChecker::VisitModuleUrl(ModuleUrl* module) {
 }
 
 
 void BreakableStatementChecker::VisitModuleStatement(ModuleStatement* stmt) {
 }
 
 
 void BreakableStatementChecker::VisitBlock(Block* stmt) {
 }
@@ skipping 1518 matching lines @@
   }
 
   return false;
 }
 
 
 #undef __
 
 
 } }  // namespace v8::internal