Switch to using an explicit ended signal instead of time comparison.

media/renderers/audio_renderer_impl.cc

 // Copyright (c) 2012 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.
 
 #include "media/renderers/audio_renderer_impl.h"
 
 #include <math.h>
 #include <stddef.h>
 #include <algorithm>
 #include <utility>
@@ skipping 628 matching lines @@
     return;
 
   AttemptRead_Locked();
 }
 
 bool AudioRendererImpl::HandleSplicerBuffer_Locked(
     const scoped_refptr<AudioBuffer>& buffer) {
   lock_.AssertAcquired();
   if (buffer->end_of_stream()) {
     received_end_of_stream_ = true;
+    if (!algorithm_->frames_buffered()) {
+      rendered_end_of_stream_ = true;
+      task_runner_->PostTask(FROM_HERE,
+                             base::Bind(&AudioRendererImpl::OnPlaybackEnded,
+                                        weak_factory_.GetWeakPtr()));
+    }
   } else {
     if (state_ == kPlaying) {
       if (IsBeforeStartTime(buffer))
         return true;
 
       // Trim off any additional time before the start timestamp.
       const base::TimeDelta trim_time = start_timestamp_ - buffer->timestamp();
       if (trim_time > base::TimeDelta()) {
         buffer->TrimStart(buffer->frame_count() *
                           (static_cast<double>(trim_time.InMicroseconds()) /
@@ skipping 318 matching lines @@
   DCHECK_NE(buffering_state_, buffering_state);
   lock_.AssertAcquired();
   buffering_state_ = buffering_state;
 
   task_runner_->PostTask(
       FROM_HERE, base::Bind(&AudioRendererImpl::OnBufferingStateChange,
                             weak_factory_.GetWeakPtr(), buffering_state_));
 }
 
 }  // namespace media