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

src/snapshot-common.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 15 matching lines @@
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 // The common functionality when building with or without snapshots.
 
 #include "v8.h"
 
 #include "api.h"
 #include "serialize.h"
 #include "snapshot.h"
 
-namespace v8 { namespace internal {
+namespace v8 {
+namespace internal {
 
 bool Snapshot::Deserialize(const byte* content, int len) {
   Deserializer des(content, len);
   des.GetFlags();
   return V8::Initialize(&des);
 }
 
 
 bool Snapshot::Initialize(const char* snapshot_file) {
   if (snapshot_file) {
@@ skipping 18 matching lines @@
   ser.Finalize(&str, &len);
 
   int written = WriteBytes(snapshot_file, str, len);
 
   DeleteArray(str);
   return written == len;
 }
 
 
 } }  // namespace v8::internal