App Version (from "Chrome Settings > About Chrome"): Top of tree

Steps to reproduce: 
1. Load a page with a MP3

Observed behavior: 
2. Page loaded is never called (either before or after starting playing the sound).
   Progression bar stays on screen forever

Expected behavior: 
2. Page loaded should be called before starting to play the music so the observer can take action before media plays.

Frequency: 
5/5

Additional comments: