Add more missing closing namespace comments.

third_party/WebKit/Source/platform/TracedValue.cpp

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "platform/TracedValue.h"
 
 #include "base/trace_event/trace_event_argument.h"
 #include "wtf/text/StringUTF8Adaptor.h"
 
 namespace blink {
@@ skipping 89 matching lines @@
     std::string out;
     m_tracedValue->AppendAsTraceFormat(&out);
     return String::fromUTF8(out.c_str());
 }
 
 void TracedValue::estimateTraceMemoryOverhead(base::trace_event::TraceEventMemoryOverhead* overhead)
 {
     m_tracedValue->EstimateTraceMemoryOverhead(overhead);
 }
 
-}
+} // namespace blink