Revert "Make scrubbing a MediaControls-internal concept"

LayoutTests/media/controls-drag-timebar.html

Index: LayoutTests/media/controls-drag-timebar.html
diff --git a/LayoutTests/media/controls-drag-timebar.html b/LayoutTests/media/controls-drag-timebar.html
index d2f546b09e9134f256ab39ce9a7c12fd6625400b..452633b02b20c56cc353ece4b94257d0799d459d 100644
--- a/LayoutTests/media/controls-drag-timebar.html
+++ b/LayoutTests/media/controls-drag-timebar.html
@@ -36,7 +36,7 @@
                     eventSender.mouseMoveTo(x, y);
                     eventSender.mouseDown();
 
-                    testExpected("video.paused", true);
+                    testExpected("video.paused", false);
 
                     // Drag mouse off of the slider thumb to make sure it continues to track
                     y += 100;
@@ -67,7 +67,7 @@
                 }
 
                 if (window.eventSender) {
-                    testExpected("video.paused", true);
+                    testExpected("video.paused", false);
                     eventSender.mouseUp();
                 }