Add more missing closing namespace comments.

third_party/WebKit/Source/platform/EventTracer.h

 /*
  * Copyright (C) 2011 Google Inc. 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
@@ skipping 46 matching lines @@
 typedef uint64_t TraceEventHandle;
 typedef intptr_t TraceEventAPIAtomicWord;
 
 class PLATFORM_EXPORT ConvertableToTraceFormat : public RefCounted<ConvertableToTraceFormat> {
 public:
     virtual String asTraceFormat() const = 0;
     virtual ~ConvertableToTraceFormat() { }
     virtual void estimateTraceMemoryOverhead(base::trace_event::TraceEventMemoryOverhead*) { }
 };
 
-}
+} // namespace TraceEvent
 
 // FIXME: Make these global variables thread-safe. Make a value update atomic.
 PLATFORM_EXPORT extern TraceEvent::TraceEventAPIAtomicWord* traceSamplingState[3];
 
 class PLATFORM_EXPORT EventTracer {
     STATIC_ONLY(EventTracer);
 public:
     static void initialize();
     static const unsigned char* getTraceCategoryEnabledFlag(const char*);
     static TraceEvent::TraceEventHandle addTraceEvent(char phase,
@@ skipping 34 matching lines @@
         const char* argNames[],
         const unsigned char argTypes[],
         const unsigned long long argValues[],
         const scoped_refptr<base::trace_event::ConvertableToTraceFormat>* convertables,
         unsigned flags);
 };
 
 } // namespace blink
 
 #endif // EventTracer_h