Gamepad API: add support for gamepadconnected and gamepaddisconnected events

public/platform/WebGamepads.h

 // 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
 //    documentation and/or other materials provided with the distribution.
@@ skipping 12 matching lines @@
 
 #ifndef WebGamepads_h
 #define WebGamepads_h
 
 #include "WebGamepad.h"
 
 #if BLINK_IMPLEMENTATION
 #include "wtf/Assertions.h"
 #endif
 
+#pragma pack(push, 1)
+
 namespace blink {
 
-#pragma pack(push, 1)
-
 // This structure is intentionally POD and fixed size so that it can be stored
 // in shared memory between hardware polling threads and the rest of the
 // browser.
 class WebGamepads {
 public:
     WebGamepads()
         : length(0) { }
 
     static const size_t itemsLengthCap = 4;
 
@@ skipping 10 matching lines @@
 #else
 COMPILE_ASSERT(sizeof(WebGamepads) == 1864, WebGamepads_has_wrong_size);
 #endif
 #endif
 
 #pragma pack(pop)
 
 }
 
 #endif // WebGamepads_h