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

src/platform-macos.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 40 matching lines @@
 #include <stdlib.h>
 
 #include <errno.h>
 
 #undef MAP_TYPE
 
 #include "v8.h"
 
 #include "platform.h"
 
-namespace v8 { namespace internal {
+namespace v8 {
+namespace internal {
 
 // 0 is never a valid thread id on MacOSX since a ptread_t is
 // a pointer.
 static const pthread_t kNoThread = (pthread_t) 0;
 
 
 double ceiling(double x) {
   // Correct Mac OS X Leopard 'ceil' behavior.
   if (-1.0 < x && x < 0.0) {
     return -0.0;
@@ skipping 496 matching lines @@
   }
 
   // This sampler is no longer the active sampler.
   active_sampler_ = NULL;
   active_ = false;
 }
 
 #endif  // ENABLE_LOGGING_AND_PROFILING
 
 } }  // namespace v8::internal