Added non-prefixed navigator.getGamepads() with updated API

LayoutTests/fast/dom/navigator-detached-no-crash-expected.txt

Index: LayoutTests/fast/dom/navigator-detached-no-crash-expected.txt
diff --git a/LayoutTests/fast/dom/navigator-detached-no-crash-expected.txt b/LayoutTests/fast/dom/navigator-detached-no-crash-expected.txt
index 571e7b6e9513a084441ca008fdb37e6c0caa4c18..becdfc33694d911b488b1e02dc4bbd8bfb345f8b 100644
--- a/LayoutTests/fast/dom/navigator-detached-no-crash-expected.txt
+++ b/LayoutTests/fast/dom/navigator-detached-no-crash-expected.txt
@@ -1,3 +1,4 @@
+CONSOLE WARNING: 'navigator.webkitGetGamepads' is deprecated. Please use 'navigator.getGamepads' instead.
 This tests that the navigator object of a deleted frame is disconnected properly. Accessing fields or methods shouldn't crash the browser. 
  Check Navigator
 navigator.appCodeName is OK
@@ -6,6 +7,7 @@ navigator.appVersion is OK
 navigator.battery is OK
 navigator.cookieEnabled is OK
 navigator.doNotTrack is OK
+navigator.getGamepads() is OK
 navigator.getStorageUpdates() is OK
 navigator.isProtocolHandlerRegistered() threw err TypeError: Failed to execute 'isProtocolHandlerRegistered' on 'Navigator': 2 arguments required, but only 0 present.
 navigator.javaEnabled() is OK
@@ -35,6 +37,7 @@ navigator.appVersion is OK
 navigator.battery is OK
 navigator.cookieEnabled is OK
 navigator.doNotTrack is OK
+navigator.getGamepads() is OK
 navigator.getStorageUpdates() is OK
 navigator.isProtocolHandlerRegistered() threw err TypeError: Failed to execute 'isProtocolHandlerRegistered' on 'Navigator': 2 arguments required, but only 0 present.
 navigator.javaEnabled() is OK