Reland of Move tracing namespace from base::debug to base::trace_event.

base/trace_event/trace_event_win.cc

 // Copyright (c) 2012 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 "base/trace_event/trace_event_win.h"
 
 #include "base/logging.h"
 #include "base/memory/singleton.h"
 #include <initguid.h>  // NOLINT
 
 namespace base {
-namespace debug {
+namespace trace_event {
 
 using base::win::EtwEventType;
 using base::win::EtwMofEvent;
 
 // {3DADA31D-19EF-4dc1-B345-037927193422}
 const GUID kChromeTraceProviderName = {
     0x3dada31d, 0x19ef, 0x4dc1, 0xb3, 0x45, 0x3, 0x79, 0x27, 0x19, 0x34, 0x22 };
 
 // {B967AE67-BB22-49d7-9406-55D91EE1D560}
 const GUID kTraceEventClass32 = {
@@ skipping 90 matching lines @@
       extra_len = (extra == NULL) ? 0 : strlen(extra);
 
     provider->TraceEvent(name, name_len, type, id, extra, extra_len);
   }
 }
 
 void TraceEventETWProvider::Resurrect() {
   StaticMemorySingletonTraits<TraceEventETWProvider>::Resurrect();
 }
 
-}  // namespace debug
+}  // namespace trace_event
 }  // namespace base