Remove unneeded uses of logging.h in header files.

chrome/browser/chrome_thread.h

 // Copyright (c) 2006-2008 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 CHROME_BROWSER_CHROME_THREAD_H__
 #define CHROME_BROWSER_CHROME_THREAD_H__
 
 #include "base/lock.h"
-#include "base/logging.h"
 #include "base/thread.h"
 
 ///////////////////////////////////////////////////////////////////////////////
 // ChromeThread
 //
 // This class represents a thread that is known by a browser-wide name.  For
 // example, there is one IO thread for the entire browser process, and various
 // pieces of code find it useful to retrieve a pointer to the IO thread's
 // MessageLoop by name:
 //
@@ skipping 52 matching lines @@
   static Lock lock_;
 
   // An array of the ChromeThread objects.  This array is protected by |lock_|.
   // The threads are not owned by this array.  Typically, the threads are owned
   // on the IU thread by the g_browser_process object.  ChromeThreads remove
   // themselves from this array upon destruction.
   static ChromeThread* chrome_threads_[ID_COUNT];
 };
 
 #endif  // #ifndef CHROME_BROWSER_CHROME_THREAD_H__