Deduplicate DeviceEvent* classes

Source/modules/gamepad/GamepadDispatcher.cpp

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "config.h"
 #include "modules/gamepad/GamepadDispatcher.h"
 
 #include "modules/gamepad/NavigatorGamepad.h"
 #include "public/platform/Platform.h"
 #include "wtf/TemporaryChange.h"
 
 namespace WebCore {
 
 GamepadDispatcher& GamepadDispatcher::instance()
 {
     DEFINE_STATIC_LOCAL(GamepadDispatcher, gamepadDispatcher, ());
     return gamepadDispatcher;
 }
 
-void GamepadDispatcher::addClient(NavigatorGamepad* client)
-{
-    addController(client);
-}
-
-void GamepadDispatcher::removeClient(NavigatorGamepad* client)
-{
-    removeController(client);
-}
-
 void GamepadDispatcher::sampleGamepads(blink::WebGamepads& gamepads)
 {
-    ASSERT(!m_controllers.isEmpty());
     blink::Platform::current()->sampleGamepads(gamepads);
 }
 
 GamepadDispatcher::GamepadDispatcher()
 {
 }
 
 GamepadDispatcher::~GamepadDispatcher()
 {
 }
 
 void GamepadDispatcher::didConnectGamepad(unsigned index, const blink::WebGamepad& gamepad)
 {
     dispatchDidConnectOrDisconnectGamepad(index, gamepad, true);
 }
 
 void GamepadDispatcher::didDisconnectGamepad(unsigned index, const blink::WebGamepad& gamepad)
 {
     dispatchDidConnectOrDisconnectGamepad(index, gamepad, false);
 }
 
 void GamepadDispatcher::dispatchDidConnectOrDisconnectGamepad(unsigned index, const blink::WebGamepad& gamepad, bool connected)
 {
-    {
-        TemporaryChange<bool> changeIsDispatching(m_isDispatching, true);
-        // Don't fire controllers removed or added during event dispatch.
-        size_t size = m_controllers.size();
-        for (size_t i = 0; i < size; ++i) {
-            if (m_controllers[i])
-                static_cast<NavigatorGamepad*>(m_controllers[i])->didConnectOrDisconnectGamepad(index, gamepad, connected);
-        }
-    }
+    ASSERT(index < blink::WebGamepads::itemsLengthCap);
+    ASSERT(connected == gamepad.connected);
 
-    if (m_needsPurge)
-        purgeControllers();
+    m_latestGamepad = gamepad;
+    m_latestGamepadIndex = index;
+    notifyControllers();
+}
+
+const blink::WebGamepad& GamepadDispatcher::latestGamepadEventData(unsigned &index) const
+{
+    index = m_latestGamepadIndex;
+    return m_latestGamepad;
 }
 
 void GamepadDispatcher::startListening()
 {
     blink::Platform::current()->setGamepadListener(this);
 }
 
 void GamepadDispatcher::stopListening()
 {
     blink::Platform::current()->setGamepadListener(0);
 }
 
 } // namespace WebCore