Move Singleton and related structs to namespace base

base/trace_event/trace_event_win.h

 // 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.
 
 // This file contains the Windows-specific declarations for trace_event.h.
 #ifndef BASE_TRACE_EVENT_TRACE_EVENT_WIN_H_
 #define BASE_TRACE_EVENT_TRACE_EVENT_WIN_H_
 
 #include <string>
 
 #include "base/base_export.h"
 #include "base/trace_event/trace_event.h"
 #include "base/win/event_trace_provider.h"
 
-// Fwd.
+namespace base {
+
 template <typename Type>
 struct StaticMemorySingletonTraits;
 
-namespace base {
 namespace trace_event {
 
 // This EtwTraceProvider subclass implements ETW logging
 // for the macros above on Windows.
 class BASE_EXPORT TraceEventETWProvider : public base::win::EtwTraceProvider {
  public:
    static const size_t kUseStrlen = static_cast<size_t>(-1);
 
   // Start logging trace events.
   // This is a noop in this implementation.
@@ skipping 86 matching lines @@
 // The "name" string as a zero-terminated ASCII string.
 // The id pointer in the machine bitness.
 // The "extra" string as a zero-terminated ASCII string.
 // Optionally the stack trace, consisting of a DWORD "depth", followed
 //    by an array of void* (machine bitness) of length "depth".
 
 }  // namespace trace_event
 }  // namespace base
 
 #endif  // BASE_TRACE_EVENT_TRACE_EVENT_WIN_H_