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

src/log.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 18 matching lines @@
 
 #include "v8.h"
 
 #include "bootstrapper.h"
 #include "log.h"
 #include "macro-assembler.h"
 #include "platform.h"
 #include "serialize.h"
 #include "string-stream.h"
 
-namespace v8 { namespace internal {
+namespace v8 {
+namespace internal {
 
 #ifdef ENABLE_LOGGING_AND_PROFILING
 
 //
 // Sliding state window.  Updates counters to keep track of the last
 // window of kBufferSize states.  This is useful to track where we
 // spent our time.
 //
 class SlidingStateWindow {
  public:
@@ skipping 1363 matching lines @@
     } else if (previous_->state_ == EXTERNAL) {
       // We are leaving V8.
       Heap::Protect();
     }
   }
 #endif
 }
 #endif
 
 } }  // namespace v8::internal