Revert of Notify the browser when the page lost interest about gamepads

Source/modules/gamepad/NavigatorGamepad.cpp

Index: Source/modules/gamepad/NavigatorGamepad.cpp
diff --git a/Source/modules/gamepad/NavigatorGamepad.cpp b/Source/modules/gamepad/NavigatorGamepad.cpp
index d8019364487ee9201b6ca19fbd257b4a6615d663..0b39cea0a4775edb93e83c9af4196c9516b2f78a 100644
--- a/Source/modules/gamepad/NavigatorGamepad.cpp
+++ b/Source/modules/gamepad/NavigatorGamepad.cpp
@@ -228,14 +228,4 @@
     m_hasEventListener = false;
 }
 
-void NavigatorGamepad::pageVisibilityChanged()
-{
-    // We inform the embedder whether it needs to provide gamepad data for us.
-    // In this sense it is irrelevant whether we need an event listener hence there is no check here.
-    if (page()->visibilityState() == PageVisibilityStateVisible)
-        startUpdating();
-    else
-        stopUpdating();
-}
-
 } // namespace WebCore