Fix an issue that video is not seekable

content/renderer/media/android/webmediaplayer_android.cc

Index: content/renderer/media/android/webmediaplayer_android.cc
diff --git a/content/renderer/media/android/webmediaplayer_android.cc b/content/renderer/media/android/webmediaplayer_android.cc
index 35e898e9bac8dba0ea903ec4571ad4eec8ade2cc..4bb016233a36016c2ab746b12df489db162da957 100644
--- a/content/renderer/media/android/webmediaplayer_android.cc
+++ b/content/renderer/media/android/webmediaplayer_android.cc
@@ -735,6 +735,10 @@ void WebMediaPlayerAndroid::OnMediaMetadataChanged(
     }
   }
 
+  // UpdateReadyState(WebMediaPlayer::ReadyStateHaveMetadata) will trigger a
+  // call to duration(), which checks |has_valid_metadata_|. so
+  // |has_valid_metadata_| has to be updated before calling UpdateReadyState().
+  has_valid_metadata_ = success;
   if (ready_state_ != WebMediaPlayer::ReadyStateHaveEnoughData) {
     UpdateReadyState(WebMediaPlayer::ReadyStateHaveMetadata);
     UpdateReadyState(WebMediaPlayer::ReadyStateHaveEnoughData);
@@ -745,8 +749,6 @@ void WebMediaPlayerAndroid::OnMediaMetadataChanged(
   if (success)
     OnVideoSizeChanged(width, height);
 
-  has_valid_metadata_ = success;
-
   if (need_to_signal_duration_changed)
     client_->durationChanged();
 }