Enable database logging on history thread.

base/thread.h

 // Copyright (c) 2006-2009 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 BASE_THREAD_H_
 #define BASE_THREAD_H_
 
 #include <string>
 
 #include "base/message_loop.h"
@@ skipping 96 matching lines @@
   PlatformThreadId thread_id() const { return thread_id_; }
 
   // Returns true if the thread has been started, and not yet stopped.
   // When a thread is running, the thread_id_ is non-zero.
   bool IsRunning() const { return thread_id_ != 0; }
 
  protected:
   // Called just prior to starting the message loop
   virtual void Init() {}
 
+  // Called to start the message loop
+  virtual void Run(MessageLoop* message_loop);
+
   // Called just after the message loop ends
   virtual void CleanUp() {}
 
   static void SetThreadWasQuitProperly(bool flag);
   static bool GetThreadWasQuitProperly();
 
   void set_message_loop(MessageLoop* message_loop) {
     message_loop_ = message_loop;
   }
 
@@ skipping 23 matching lines @@
   std::string name_;
 
   friend class ThreadQuitTask;
 
   DISALLOW_COPY_AND_ASSIGN(Thread);
 };
 
 }  // namespace base
 
 #endif  // BASE_THREAD_H_