Make LoadLog refcounted-thread safe....

net/base/load_log.h

 // Copyright (c) 2009 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.
 
 #ifndef NET_BASE_LOAD_LOG_H_
 #define NET_BASE_LOAD_LOG_H_
 
 #include <vector>
 
 #include "base/ref_counted.h"
 #include "base/time.h"
 
 namespace net {
 
 // LoadLog stores profiling information on where time was spent while servicing
 // a request (waiting in queues, resolving hosts, resolving proxy, etc...).
-class LoadLog : public base::RefCounted<LoadLog> {
+//
+// Note that LoadLog is NOT THREADSAFE, however it is RefCountedThreadSafe so
+// that it can be AddRef() / Release() across threads.
+class LoadLog : public base::RefCountedThreadSafe<LoadLog> {
  public:
 
   enum EventType {
 #define EVENT_TYPE(label) TYPE_ ## label,
 #include "net/base/load_log_event_type_list.h"
 #undef EVENT_TYPE
   };
 
   // Whether this is the start/end of an event. Or in the case of EventTypes
   // that are "instantaneous", kNone.
@@ skipping 74 matching lines @@
   // Copies all events from |log|, appending it to the end of |this|.
   void Append(const LoadLog* log);
 
  private:
   EventList events_;
 };
 
 }  // namespace net
 
 #endif  // NET_BASE_LOAD_LOG_H_