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

src/builtins.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 14 matching lines @@
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 #include "v8.h"
 
 #include "api.h"
 #include "bootstrapper.h"
 #include "builtins.h"
 #include "ic-inl.h"
 
-namespace v8 { namespace internal {
+namespace v8 {
+namespace internal {
 
 // ----------------------------------------------------------------------------
 // Support macros for defining builtins in C.
 // ----------------------------------------------------------------------------
 //
 // A builtin function is defined by writing:
 //
 //   BUILTIN(name) {
 //     ...
 //   }
@@ skipping 711 matching lines @@
       if (entry->contains(pc)) {
         return names_[i];
       }
     }
   }
   return NULL;
 }
 
 
 } }  // namespace v8::internal