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

src/platform-nullos.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 @@
 // Minimal include to get access to abort, fprintf and friends for bootstrapping
 // messages.
 #include <stdio.h>
 #include <stdlib.h>
 
 #include "v8.h"
 
 #include "platform.h"
 
 
-namespace v8 { namespace internal {
+namespace v8 {
+namespace internal {
 
 // Give V8 the opportunity to override the default ceil behaviour.
 double ceiling(double x) {
   UNIMPLEMENTED();
   return 0;
 }
 
 
 // Initialize OS class early in the V8 startup.
 void OS::Setup() {
@@ skipping 375 matching lines @@
 }
 
 
 void ProfileSampler::Stop() {
   UNIMPLEMENTED();
 }
 
 #endif  // ENABLE_LOGGING_AND_PROFILING
 
 } }  // namespace v8::internal