Gamepad API: add support for gamepadconnected and gamepaddisconnected events

public/platform/Platform.h

 /*
  * Copyright (C) 2012 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 20 matching lines @@
 #ifndef Platform_h
 #define Platform_h
 
 #ifdef WIN32
 #include <windows.h>
 #endif
 
 #include "WebAudioDevice.h"
 #include "WebCommon.h"
 #include "WebData.h"
+#include "WebGamepadListener.h"
 #include "WebGamepads.h"
 #include "WebGraphicsContext3D.h"
 #include "WebLocalizedString.h"
 #include "WebScreenOrientation.h"
 #include "WebSpeechSynthesizer.h"
 #include "WebStorageQuotaCallbacks.h"
 #include "WebStorageQuotaType.h"
 #include "WebString.h"
 #include "WebURLError.h"
 #include "WebVector.h"
@@ skipping 162 matching lines @@
     // IndexedDB ----------------------------------------------------------
 
     // Must return non-null.
     virtual WebIDBFactory* idbFactory() { return 0; }
 
 
     // Gamepad -------------------------------------------------------------
 
     virtual void sampleGamepads(WebGamepads& into) { into.length = 0; }
 
+    virtual void setGamepadListener(WebGamepadListener*) { }
 
     // History -------------------------------------------------------------
 
     // Returns the hash for the given canonicalized URL for use in visited
     // link coloring.
     virtual unsigned long long visitedLinkHash(
         const char* canonicalURL, size_t length) { return 0; }
 
     // Returns whether the given link hash is in the user's history. The
     // hash must have been generated by calling VisitedLinkHash().
@@ skipping 405 matching lines @@
     virtual WebDatabaseObserver* databaseObserver() { return 0; }
 
 
 protected:
     virtual ~Platform() { }
 };
 
 } // namespace blink
 
 #endif