Assert that frame() derefs a non-null pointer.

Source/core/editing/SpellCheckRequester.h

 /*
  * Copyright (C) 2010 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 99 matching lines @@
     bool canCheckAsynchronously(Range*) const;
     TextCheckerClient& client() const;
     void timerFiredToProcessQueuedRequest(Timer<SpellCheckRequester>*);
     void invokeRequest(PassRefPtrWillBeRawPtr<SpellCheckRequest>);
     void enqueueRequest(PassRefPtrWillBeRawPtr<SpellCheckRequest>);
     void didCheckSucceed(int sequence, const Vector<TextCheckingResult>&);
     void didCheckCancel(int sequence);
     void didCheck(int sequence, const Vector<TextCheckingResult>&);
 
     RawPtrWillBeMember<LocalFrame> m_frame;
-    LocalFrame& frame() const { ASSERT(m_frame); return *m_frame; }
+    LocalFrame& frame() const
+    {
+        ASSERT(m_frame);
+        return *m_frame;
+    }
 
     int m_lastRequestSequence;
     int m_lastProcessedSequence;
 
     Timer<SpellCheckRequester> m_timerToProcessQueuedRequest;
 
     RefPtrWillBeMember<SpellCheckRequest> m_processingRequest;
 
     typedef WillBeHeapDeque<RefPtrWillBeMember<SpellCheckRequest> > RequestQueue;
     RequestQueue m_requestQueue;
 };
 
 } // namespace blink
 
 #endif // SpellCheckRequester_h