Implement the activation behavior of media elements (click to play/pause)

LayoutTests/fullscreen/resources/video.html

Index: LayoutTests/fullscreen/resources/video.html
diff --git a/LayoutTests/fullscreen/resources/video.html b/LayoutTests/fullscreen/resources/video.html
index 8d0e945272689ed7c9b7d7b51f763360cdd9a07d..aba93ee2f0ba17dbab2f61100ec0aa112efeec31 100644
--- a/LayoutTests/fullscreen/resources/video.html
+++ b/LayoutTests/fullscreen/resources/video.html
@@ -15,8 +15,10 @@ onload = function() {
     video.src = mediaFile;
     video.addEventListener('canplaythrough', canplaythrough);
     video.addEventListener('webkitfullscreenchange', fullscreenChanged);
-    video.onclick  = function() {
+    video.onclick = function(event) {
         video.webkitRequestFullscreen();
+        // cancel the activation behavior (click to play/pause)
+        event.preventDefault();
     };
 }
 </script>