Split nested namespaces declaration in two lines in accordance with C++ Style Guide.

src/parser.cc

 // Copyright 2006-2008 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 19 matching lines @@
 #include "api.h"
 #include "ast.h"
 #include "bootstrapper.h"
 #include "compiler.h"
 #include "platform.h"
 #include "runtime.h"
 #include "parser.h"
 #include "scopes.h"
 #include "string-stream.h"
 
-namespace v8 { namespace internal {
+namespace v8 {
+namespace internal {
 
 class ParserFactory;
 class ParserLog;
 class TemporaryScope;
 class Target;
 
 template <typename T> class ZoneListWrapper;
 
 
 // PositionStack is used for on-stack allocation of token positions for
@@ skipping 4573 matching lines @@
                        start_position,
                        is_expression);
   return result;
 }
 
 
 #undef NEW
 
 
 } }  // namespace v8::internal