make multibuffer work with layout tests

media/blink/multibuffer_reader.h

 // Copyright 2015 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_MULTIBUFFER_READER_H_
 #define MEDIA_BLINK_MULTIBUFFER_READER_H_
 
 #include <stdint.h>
 
 #include <limits>
@@ skipping 92 matching lines @@
 
   // Check if wait operation can complete now.
   void CheckWait();
 
   // Recalculate preload_pos_ and update our entry in the multibuffer
   // reader index. Also call CheckWait(). This function is basically
   // called anything changes, like when we get more data or seek to
   // a new position.
   void UpdateInternalState();
 
+  // Update end_ if p-1 contains an end-of-stream block.
+  void UpdateEnd(MultiBufferBlockId p);
+
   // Indirection function used to call callbacks. When we post a callback
   // we indirect it through a weak_ptr and this function to make sure we
   // don't call any callbacks after this object has been destroyed.
   void Call(const base::Closure& cb) const;
 
   // The multibuffer we're wrapping, not owned.
   MultiBuffer* multibuffer_;
 
   // We're not interested in reading past this position.
   int64_t end_;
@@ skipping 26 matching lines @@
 
   // Progress callback.
   base::Callback<void(int64_t, int64_t)> progress_callback_;
 
   base::WeakPtrFactory<MultiBufferReader> weak_factory_;
 };
 
 }  // namespace media
 
 #endif  // MEDIA_BLINK_MULTIBUFFER_READER_H_