Implement evictFrames() to support MSE's coded frame eviction algorithm.

media/blink/websourcebuffer_impl.h

 // Copyright 2013 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_BLINK_WEBSOURCEBUFFER_IMPL_H_
 #define MEDIA_BLINK_WEBSOURCEBUFFER_IMPL_H_
 
 #include <string>
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "base/time/time.h"
 #include "third_party/WebKit/public/platform/WebSourceBuffer.h"
 
 namespace media {
 class ChunkDemuxer;
 
 class WebSourceBufferImpl : public blink::WebSourceBuffer {
  public:
   WebSourceBufferImpl(const std::string& id, ChunkDemuxer* demuxer);
   virtual ~WebSourceBufferImpl();
 
   // blink::WebSourceBuffer implementation.
   virtual void setClient(blink::WebSourceBufferClient* client);
   virtual bool setMode(AppendMode mode);
   virtual blink::WebTimeRanges buffered();
+  virtual bool evictCodedFrames();
   virtual void append(
       const unsigned char* data,
       unsigned length,
       double* timestamp_offset);
   virtual void abort();
   virtual void remove(double start, double end);
   virtual bool setTimestampOffset(double offset);
   virtual void setAppendWindowStart(double start);
   virtual void setAppendWindowEnd(double end);
   virtual void removedFromMediaSource();
@@ skipping 15 matching lines @@
 
   base::TimeDelta append_window_start_;
   base::TimeDelta append_window_end_;
 
   DISALLOW_COPY_AND_ASSIGN(WebSourceBufferImpl);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_BLINK_WEBSOURCEBUFFER_IMPL_H_