Fix broken normalization of some HID axes on OSX

content/browser/gamepad/gamepad_platform_data_fetcher_mac.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 CONTENT_BROWSER_GAMEPAD_GAMEPAD_PLATFORM_DATA_FETCHER_MAC_H_
 #define CONTENT_BROWSER_GAMEPAD_GAMEPAD_PLATFORM_DATA_FETCHER_MAC_H_
 
 #include <CoreFoundation/CoreFoundation.h>
 #include <IOKit/hid/IOHIDManager.h>
 #include <stddef.h>
@@ skipping 70 matching lines @@
   // to update data_.
   struct AssociatedData {
     bool is_xbox;
     union {
       struct {
         IOHIDDeviceRef device_ref;
         IOHIDElementRef button_elements[blink::WebGamepad::buttonsLengthCap];
         IOHIDElementRef axis_elements[blink::WebGamepad::axesLengthCap];
         CFIndex axis_minimums[blink::WebGamepad::axesLengthCap];
         CFIndex axis_maximums[blink::WebGamepad::axesLengthCap];
+        CFIndex axis_report_sizes[blink::WebGamepad::axesLengthCap];
       } hid;
       struct {
         XboxController* device;
         UInt32 location_id;
       } xbox;
     };
   };
   AssociatedData associated_[blink::WebGamepads::itemsLengthCap];
 
   DISALLOW_COPY_AND_ASSIGN(GamepadPlatformDataFetcherMac);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_GAMEPAD_GAMEPAD_PLATFORM_DATA_FETCHER_MAC_H_