Proof-reading comments in base/message_loop/.

base/message_loop/message_pump_win.h

Index: base/message_loop/message_pump_win.h
diff --git a/base/message_loop/message_pump_win.h b/base/message_loop/message_pump_win.h
index 00a1e77e2798cf24695cb42210b5f6c6f131f4c0..9f1838d6e4f1fbe2cf25b35d3268f3c18c1363f7 100644
--- a/base/message_loop/message_pump_win.h
+++ b/base/message_loop/message_pump_win.h
@@ -78,7 +78,7 @@ class BASE_EXPORT MessagePumpWin : public MessagePump {
 // 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