Update media duration if data is appended after the previous duration

webkit/media/webmediaplayer_proxy.cc

Index: webkit/media/webmediaplayer_proxy.cc
diff --git a/webkit/media/webmediaplayer_proxy.cc b/webkit/media/webmediaplayer_proxy.cc
index 29011ac930216a8289ad99a6eb109e035d914207..dea2fe646f124ccbc0adab20de5b5ed7f8f21f14 100644
--- a/webkit/media/webmediaplayer_proxy.cc
+++ b/webkit/media/webmediaplayer_proxy.cc
@@ -112,6 +112,11 @@ void WebMediaPlayerProxy::PipelineErrorCallback(PipelineStatus error) {
       &WebMediaPlayerProxy::PipelineErrorTask, this, error));
 }
 
+void WebMediaPlayerProxy::PipelineDurationChangedCallback() {
+  render_loop_->PostTask(FROM_HERE, base::Bind(
+      &WebMediaPlayerProxy::PipelineDurationChangedTask, this));
+}
+
 void WebMediaPlayerProxy::RepaintTask() {
   DCHECK(render_loop_->BelongsToCurrentThread());
   {
@@ -148,6 +153,12 @@ void WebMediaPlayerProxy::PipelineErrorTask(PipelineStatus error) {
     webmediaplayer_->OnPipelineError(error);
 }
 
+void WebMediaPlayerProxy::PipelineDurationChangedTask() {
+  DCHECK(render_loop_->BelongsToCurrentThread());
+  if (webmediaplayer_)
+    webmediaplayer_->OnPipelineDurationChanged();
+}
+
 void WebMediaPlayerProxy::SetOpaqueTask(bool opaque) {
   DCHECK(render_loop_->BelongsToCurrentThread());
   if (webmediaplayer_)