Added displayId to Gamepad

ppapi/shared_impl/ppb_gamepad_shared.h

 // Copyright (c) 2012 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.
 
 #ifndef PPAPI_SHARED_IMPL_PPB_GAMEPAD_SHARED_H_
 #define PPAPI_SHARED_IMPL_PPB_GAMEPAD_SHARED_H_
 
 #include <stddef.h>
 
 #include "base/atomicops.h"
@@ skipping 73 matching lines @@
 
   // Normalized values representing buttons, in the range [0..1].
   WebKitGamepadButton buttons[kButtonsLengthCap];
 
   // Mapping type (for example "standard")
   base::char16 mapping[kMappingLengthCap];
 
   WebKitGamepadPose pose;
 
   WebKitGamepadHand hand;
+
+  // ID of the VRDisplay this gamepad is associated with, if any.
+  unsigned display_id;
 };
 
 // This must match the definition of blink::Gamepads. The GamepadHost unit
 // test has some compile asserts to validate this.
 struct WebKitGamepads {
   static const size_t kItemsLengthCap = 4;
 
   // Number of valid entries in the items array.
   unsigned length;
 
@@ skipping 11 matching lines @@
 
 #pragma pack(pop)
 
 PPAPI_SHARED_EXPORT void ConvertWebKitGamepadData(
     const WebKitGamepads& webkit_data,
     PP_GamepadsSampleData* output_data);
 
 }  // namespace ppapi
 
 #endif  // PPAPI_SHARED_IMPL_PPB_GAMEPAD_SHARED_H_