Bug 879717: Part 1-Delay entering HAVE_CURRENT_DATA state until a video frame has been stored in the image container. r=cpearce
Bug 879717: Part 2 - Avoid having autoplaying stream-backed HTMLMediaElements block indefinitely. r=roc
Bug 879717: Part 3 - Update screen wake lock when metadata has loaded. r=roc,esawin
Bug 879717: Part 4 - Add mochitest for bug 879717 r=roc