Add return-by-value implementations of blink::WebMediaPlayer::buffered()

content/renderer/media/android/media_source_delegate.cc

Index: content/renderer/media/android/media_source_delegate.cc
diff --git a/content/renderer/media/android/media_source_delegate.cc b/content/renderer/media/android/media_source_delegate.cc
index 6b6523c060ca085329f42679192385c60585aeef..bd786b01e173cae84bb8f231bfb8306ab883b6f6 100644
--- a/content/renderer/media/android/media_source_delegate.cc
+++ b/content/renderer/media/android/media_source_delegate.cc
@@ -190,6 +190,10 @@ const blink::WebTimeRanges& MediaSourceDelegate::Buffered() {
   return buffered_web_time_ranges_;
 }
 
+blink::WebTimeRanges MediaSourceDelegate::Buffered() const {
+  return ConvertToWebTimeRanges(buffered_time_ranges_);
+}
+
 size_t MediaSourceDelegate::DecodedFrameCount() const {
   return statistics_.video_frames_decoded;
 }