Proof-reading comments in base/message_loop/.

base/message_loop/message_pump_win.h

 // Copyright (c) 2012 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_MESSAGE_LOOP_MESSAGE_PUMP_WIN_H_
 #define BASE_MESSAGE_LOOP_MESSAGE_PUMP_WIN_H_
 
 #include <windows.h>
 
 #include <list>
@@ skipping 60 matching lines @@
 // this pump goes into a wait state. In most cases, this message pump handles
 // all processing.
 //
 // However, when a task, or windows event, invokes on the stack a native dialog
 // box or such, that window typically provides a bare bones (native?) message
 // pump.  That bare-bones message pump generally supports little more than a
 // peek of the Windows message queue, followed by a dispatch of the peeked
 // message.  MessageLoop extends that bare-bones message pump to also service
 // Tasks, at the cost of some complexity.
 //
-// The basic structure of the extension (refered to as a sub-pump) is that a
+// The basic structure of the extension (referred to as a sub-pump) is that a
 // special message, kMsgHaveWork, is repeatedly injected into the Windows
 // Message queue.  Each time the kMsgHaveWork message is peeked, checks are
 // made for an extended set of events, including the availability of Tasks to
 // run.
 //
 // After running a task, the special message kMsgHaveWork is again posted to
 // the Windows Message queue, ensuring a future time slice for processing a
 // future event.  To prevent flooding the Windows Message queue, care is taken
 // to be sure that at most one kMsgHaveWork message is EVER pending in the
 // Window's Message queue.
@@ skipping 240 matching lines @@
   // This list will be empty almost always. It stores IO completions that have
   // not been delivered yet because somebody was doing cleanup.
   std::list<IOItem> completed_io_;
 
   ObserverList<IOObserver> io_observers_;
 };
 
 }  // namespace base
 
 #endif  // BASE_MESSAGE_LOOP_MESSAGE_PUMP_WIN_H_