Missing buffered attribute for <video>/<audio>

media/base/pipeline_impl.cc

Index: media/base/pipeline_impl.cc
diff --git a/media/base/pipeline_impl.cc b/media/base/pipeline_impl.cc
index a09c2c7bd320abbd54392429115ac6196c79f75b..6424c1c7b19254b7e0e67a421be253ec08e9b7bf 100644
--- a/media/base/pipeline_impl.cc
+++ b/media/base/pipeline_impl.cc
@@ -211,7 +211,22 @@ base::TimeDelta PipelineImpl::GetCurrentTime() const {
 
 base::TimeDelta PipelineImpl::GetBufferedTime() const {
   AutoLock auto_lock(lock_);
-  return buffered_time_;
+
+  // If buffered time was set, we report that value directly.
+  if (buffered_time_.ToInternalValue() > 0)
+    return buffered_time_;
+
+  // If buffered time was not set, we use duration and buffered bytes to
+  // estimate the buffered time.
+  // TODO(hclam): The estimation is based on linear interpolation which is
+  // not accurate enough. We should find a better way to estimate the value.
+  if (total_bytes_ == 0)
+    return base::TimeDelta();
+
+  double ratio = buffered_bytes_;
+  ratio /= total_bytes_;
+  return base::TimeDelta::FromMilliseconds(
+      static_cast<int64>(duration_.InMilliseconds() * ratio));
 }
 
 base::TimeDelta PipelineImpl::GetDuration() const {