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

src/handles.cc

 // Copyright 2009 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 "accessors.h"
 #include "api.h"
 #include "bootstrapper.h"
 #include "compiler.h"
 #include "debug.h"
 #include "execution.h"
 #include "global-handles.h"
 #include "natives.h"
 #include "runtime.h"
 
-namespace v8 { namespace internal {
+namespace v8 {
+namespace internal {
 
 
 v8::ImplementationUtilities::HandleScopeData HandleScope::current_ =
     { -1, NULL, NULL };
 
 
 int HandleScope::NumberOfHandles() {
   int n = HandleScopeImplementer::instance()->Blocks()->length();
   if (n == 0) return 0;
   return ((n - 1) * kHandleBlockSize) +
@@ skipping 680 matching lines @@
   Handle<Map> new_map = Factory::CopyMapDropTransitions(old_map);
   obj->set_map(*new_map);
   new_map->set_needs_loading(true);
   // Store the lazy loading info in the constructor field.  We'll
   // reestablish the constructor from the fixed array after loading.
   new_map->set_constructor(*arr);
   ASSERT(!obj->IsLoaded());
 }
 
 } }  // namespace v8::internal