Move Singleton and related structs to namespace base

base/trace_event/trace_event_etw_export_win.cc

 // Copyright 2015 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_etw_export_win.h"
 
 #include "base/command_line.h"
 #include "base/logging.h"
 #include "base/memory/singleton.h"
 #include "base/strings/string_tokenizer.h"
@@ skipping 115 matching lines @@
     return EventUnregisterProc(RegHandle);
   return 0;
 }
 
 namespace base {
 namespace trace_event {
 
 // This object will be created by each process. It's a background (low-priority)
 // thread that will monitor the ETW keyword for any changes.
 class TraceEventETWExport::ETWKeywordUpdateThread
-    : public base::PlatformThread::Delegate {
+    : public PlatformThread::Delegate {
  public:
   ETWKeywordUpdateThread() {}
   ~ETWKeywordUpdateThread() override {}
 
   // Implementation of PlatformThread::Delegate:
   void ThreadMain() override {
-    base::PlatformThread::SetName("ETW Keyword Update Thread");
-    base::TimeDelta sleep_time =
-        base::TimeDelta::FromMilliseconds(kUpdateTimerDelayMs);
+    PlatformThread::SetName("ETW Keyword Update Thread");
+    TimeDelta sleep_time = TimeDelta::FromMilliseconds(kUpdateTimerDelayMs);
     while (1) {
-      base::PlatformThread::Sleep(sleep_time);
-      base::trace_event::TraceEventETWExport::UpdateETWKeyword();
+      PlatformThread::Sleep(sleep_time);
+      trace_event::TraceEventETWExport::UpdateETWKeyword();
     }
   }
 
  private:
   // Time between checks for ETW keyword changes (in milliseconds).
   unsigned int kUpdateTimerDelayMs = 1000;
 };
 
 
 TraceEventETWExport::TraceEventETWExport()
@@ skipping 276 matching lines @@
 // static
 void TraceEventETWExport::UpdateETWKeyword() {
   if (!IsETWExportEnabled())
     return;
   auto* instance = GetInstance();
   DCHECK(instance);
   instance->UpdateEnabledCategories();
 }
 }  // namespace trace_event
 }  // namespace base