More style nits.

chrome/browser/hang_monitor/hung_window_detector.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_HUNG_WINDOW_DETECTOR_H__
-#define CHROME_BROWSER_HUNG_WINDOW_DETECTOR_H__
+#ifndef CHROME_BROWSER_HANG_MONITOR_HUNG_WINDOW_DETECTOR_H__
+#define CHROME_BROWSER_HANG_MONITOR_HUNG_WINDOW_DETECTOR_H__
 
 #include "base/lock.h"
 #include "chrome/common/worker_thread_ticker.h"
 
 // This class provides the following functionality:
 // Given a top-level window handle, it enumerates all descendant windows
 // of that window and, on finding a window that belongs to a different
 // thread from that of the top-level window, it tests to see if that window
 // is responding to messages. It does this test by first calling the
 // IsHungAppWindow API and, additionally (since the IsHungAppWindow API
@@ skipping 24 matching lines @@
     // child windows of the browser window to check if they are hung.
     virtual bool OnHungWindowDetected(HWND hung_window, HWND top_level_window,
                                       ActionOnHungWindow* action) = 0;
   };
 
   // The notification object is not owned by this class. It is assumed that
   // this pointer will be valid throughout the lifetime of this class.
   // Ownership of this pointer is not transferred to this class.
   // Note that the Initialize method needs to be called to initiate monitoring
   // of hung windows.
-  HungWindowDetector(HungWindowNotification* notification);
+  explicit HungWindowDetector(HungWindowNotification* notification);
   ~HungWindowDetector();
 
   // This method initialized the monitoring of hung windows. All descendant
   // windows of the passed-in top-level window which belong to a thread
   // different from that of the top-level window are monitored. The
   // message_response_timeout parameter indicates how long this class must
   // wait for a window to respond to a sent message before it is considered
   // to be non-responsive.
   // Initialize can be called multiple times to change the actual window to
   // be monitored as well as the message response timeout
@@ skipping 19 matching lines @@
   // How long do we wait before we consider a window hung (in ms)
   int message_response_timeout_;
   Lock hang_detection_lock_;
   // Indicates if this object is currently enumerating hung windows
   bool enumerating_;
 
   DISALLOW_EVIL_CONSTRUCTORS(HungWindowDetector);
 };
 
 
-#endif  // CHROME_BROWSER_HUNG_WINDOW_DETECTOR_H__
+#endif  // CHROME_BROWSER_HANG_MONITOR_HUNG_WINDOW_DETECTOR_H__