aura: Fix unit_tests on linux

base/message_pump_observer.h

 // Copyright (c) 2011 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_PUMP_OBSERVER_H
 #define BASE_MESSAGE_PUMP_OBSERVER_H
 #pragma once
 
 #include "base/event_types.h"
 
@@ skipping 20 matching lines @@
   // method returns EVENT_HANDLED, it indicates the event has already
   // been handled, so the event is not processed any farther. If the
   // method returns EVENT_CONTINUE, the event dispatching proceeds as
   // normal.
   virtual EventStatus WillProcessEvent(const NativeEvent& event) = 0;
 
   // This method is called after processing a message. This method
   // will not be called if WillProcessEvent returns EVENT_HANDLED.
   virtual void DidProcessEvent(const NativeEvent& event) = 0;
 
+  // This method is called just before the message pump is destroyed.
+  virtual void OnMessagePumpDestroying() {}

[darin (slow to review), 2011/11/30 06:30:31]

nit: I think a better name would be WillDestroyMessagePump.  Notice how that
makes the comment unnecessary / redundant?

I also recommend listing destruction notifications first.

+
  protected:
   virtual ~MessagePumpObserver() {}
 };
 
 }  // namespace base
 
 #endif  // BASE_MESSAGE_PUMP_OBSERVER_VIEWS_H