Update media duration if data is appended after the previous duration

webkit/media/webmediaplayer_impl.cc

Index: webkit/media/webmediaplayer_impl.cc
diff --git a/webkit/media/webmediaplayer_impl.cc b/webkit/media/webmediaplayer_impl.cc
index b5f65d056bdb0ea80c3722ab69cc44e690c90894..22a1476010dd71671018233f564a36476fd89b24 100644
--- a/webkit/media/webmediaplayer_impl.cc
+++ b/webkit/media/webmediaplayer_impl.cc
@@ -679,7 +679,15 @@ bool WebMediaPlayerImpl::sourceAppend(const WebKit::WebString& id,
                                       const unsigned char* data,
                                       unsigned length) {
   DCHECK_EQ(main_loop_, MessageLoop::current());
-  return proxy_->DemuxerAppend(id.utf8().data(), data, length);
+
+  float old_duration = duration();
+  if (!proxy_->DemuxerAppend(id.utf8().data(), data, length))
+    return false;
+
+  if (old_duration != duration())
+    GetClient()->durationChanged();
+
+  return true;
 }
 
 bool WebMediaPlayerImpl::sourceAbort(const WebKit::WebString& id) {
@@ -705,7 +713,11 @@ void WebMediaPlayerImpl::sourceEndOfStream(
       NOTIMPLEMENTED();
   }
 
+  float old_duration = duration();
   proxy_->DemuxerEndOfStream(pipeline_status);
+
+  if (old_duration != duration())
+    GetClient()->durationChanged();
 }
 
 WebKit::WebMediaPlayer::MediaKeyException