Remove Gamepad runtime flag (status=stable) for blink

Source/modules/gamepad/NavigatorGamepad.cpp

 /*
  * Copyright (C) 2011, Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are met:
  *
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 17 matching lines @@
 
 #include "core/dom/Document.h"
 #include "core/frame/LocalDOMWindow.h"
 #include "core/frame/LocalFrame.h"
 #include "core/frame/Navigator.h"
 #include "core/page/Page.h"
 #include "modules/gamepad/GamepadDispatcher.h"
 #include "modules/gamepad/GamepadEvent.h"
 #include "modules/gamepad/GamepadList.h"
 #include "modules/gamepad/WebKitGamepadList.h"
-#include "platform/RuntimeEnabledFeatures.h"
 
 namespace blink {
 
 template<typename T>
 static void sampleGamepad(unsigned index, T& gamepad, const WebGamepad& webGamepad)
 {
     gamepad.setId(webGamepad.id);
     gamepad.setIndex(index);
     gamepad.setConnected(webGamepad.connected);
     gamepad.setTimestamp(webGamepad.timestamp);
@@ skipping 172 matching lines @@
     return false;
 }
 
 static bool isGamepadEvent(const AtomicString& eventType)
 {
     return eventType == EventTypeNames::gamepadconnected || eventType == EventTypeNames::gamepaddisconnected;
 }
 
 void NavigatorGamepad::didAddEventListener(LocalDOMWindow*, const AtomicString& eventType)
 {
-    if (RuntimeEnabledFeatures::gamepadEnabled() && isGamepadEvent(eventType)) {
+    if (isGamepadEvent(eventType)) {
         if (page() && page()->visibilityState() == PageVisibilityStateVisible)
             startUpdating();
         m_hasEventListener = true;
     }
 }
 
 void NavigatorGamepad::didRemoveEventListener(LocalDOMWindow* window, const AtomicString& eventType)
 {
     if (isGamepadEvent(eventType)
         && !window->hasEventListeners(EventTypeNames::gamepadconnected)
@@ skipping 46 matching lines @@
         if (connectedGamepadChanged || (!oldWasConnected && newIsConnected)) {
             m_pendingEvents.append(newGamepad);
         }
     }
 
     if (!m_pendingEvents.isEmpty())
         m_dispatchOneEventRunner.runAsync();
 }
 
 } // namespace blink