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

src/objects.h

 // 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 91 matching lines @@
   NONE              = v8::None,
   READ_ONLY         = v8::ReadOnly,
   DONT_ENUM         = v8::DontEnum,
   DONT_DELETE       = v8::DontDelete,
   ABSENT            = 16  // Used in runtime to indicate a property is absent.
   // ABSENT can never be stored in or returned from a descriptor's attributes
   // bitfield.  It is only used as a return value meaning the attributes of
   // a non-existent property.
 };
 
-namespace v8 { namespace internal {
+namespace v8 {
+namespace internal {
 
 
 // PropertyDetails captures type and attributes for a property.
 // They are used both in property dictionaries and instance descriptors.
 class PropertyDetails BASE_EMBEDDED {
  public:
 
   PropertyDetails(PropertyAttributes attributes,
                   PropertyType type,
                   int index = 0) {
@@ skipping 4274 matching lines @@
     } else {
       value &= ~(1 << bit_position);
     }
     return value;
   }
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_OBJECTS_H_