Delete WebGamepads::length.

third_party/WebKit/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 17 matching lines @@
 
 #pragma pack(push, 1)
 
 namespace blink {
 
 // 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;
 
-  // Number of valid entries in the items array.
-  unsigned length;
-
   // Gamepad data for N separate gamepad devices.
   WebGamepad items[itemsLengthCap];
 };
 
 #pragma pack(pop)
 }
 
 #endif  // WebGamepads_h