Remove unneeded uses of logging.h in header files.

tools/memory_watcher/hotkey.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 TOOLS_MEMORY_WATCHER_HOTKEY_H_
 #define TOOLS_MEMORY_WATCHER_HOTKEY_H_
 
 #include <atlbase.h>
 #include <atlwin.h>
-#include "base/logging.h"
 
 // HotKey handler.
 // Programs wishing to register a hotkey can use this.
 class HotKeyHandler : public CWindowImpl<HotKeyHandler> {
  public:
   HotKeyHandler(UINT modifiers, UINT vk)
     : m_modifiers(modifiers),
       m_vkey(vk) {
     Start();
   }
@@ skipping 19 matching lines @@
 
   // Handle the registered Hotkey being pressed.
   virtual LRESULT OnHotKey(UINT /*uMsg*/, WPARAM /*wParam*/,
                            LPARAM /*lParam*/, BOOL& bHandled) = 0;
 
   UINT m_modifiers;
   UINT m_vkey;
 };
 
 #endif  // TOOLS_MEMORY_WATCHER_HOTKEY_H_