Pipeline_Impl was modified to properly render a stream that has video but no ...

media/base/mock_pipeline.h

 // Copyright (c) 2009 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 MEDIA_BASE_MOCK_PIPELINE_H_
 #define MEDIA_BASE_MOCK_PIPELINE_H_
 
 #include <string>
 
 #include "media/base/media_format.h"
@@ skipping 49 matching lines @@
   }
 
   virtual base::TimeDelta GetInterpolatedTime() const {
     return time_;
   }
 
   virtual PipelineError GetError() const {
     return error_;
   }
 
+  virtual bool IsRendered(const std::string&) const {
+    return true;
+  }
+
   // Implementation of Pipeline interface.
   virtual bool Start(FilterFactory* filter_factory,
                      const std::string& url,
                      Callback1<bool>::Type* init_complete_callback) {
     EXPECT_FALSE(initialized_);
     initialized_ = true;
     if (init_complete_callback) {
       init_complete_callback->Run(true);
       delete init_complete_callback;
     }
@@ skipping 84 matching lines @@
   size_t height_;
   int64 buffered_bytes_;
   int64 total_bytes_;
 
   DISALLOW_COPY_AND_ASSIGN(MockPipeline);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_BASE_MOCK_PIPELINE_H_