Start deinlining non-empty virtual methods. (This will be automatically checked

media/base/filters.h

 // Copyright (c) 2010 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.
 
 // Filters are connected in a strongly typed manner, with downstream filters
 // always reading data from upstream filters.  Upstream filters have no clue
 // who is actually reading from them, and return the results via callbacks.
 //
 //                         DemuxerStream(Video) <- VideoDecoder <- VideoRenderer
 // DataSource <- Demuxer <
@@ skipping 183 matching lines @@
 
   virtual void EnableBitstreamConverter() = 0;
 
  protected:
   // Optional method that is implemented by filters that support extended
   // interfaces.  The filter should return a pointer to the interface
   // associated with the |interface_id| string if they support it, otherwise
   // return NULL to indicate the interface is unknown.  The derived filter
   // should NOT AddRef() the interface.  The DemuxerStream::QueryInterface()
   // public template function will assign the interface to a scoped_refptr<>.
-  virtual void* QueryInterface(const char* interface_id) { return NULL; }
+  virtual void* QueryInterface(const char* interface_id);
 
   friend class base::RefCountedThreadSafe<DemuxerStream>;
   virtual ~DemuxerStream();
 };
 
 
 class VideoDecoder : public Filter {
  public:
   virtual const char* major_mime_type() const;
   virtual bool requires_message_loop() const;
@@ skipping 103 matching lines @@
   // buffer.
   virtual bool HasEnded() = 0;
 
   // Sets the output volume.
   virtual void SetVolume(float volume) = 0;
 };
 
 }  // namespace media
 
 #endif  // MEDIA_BASE_FILTERS_H_