Gamepad: Gamepads length should be maximum supported.

content/browser/gamepad/gamepad_platform_data_fetcher_mac.mm

 // 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.
 
 #include "content/browser/gamepad/gamepad_platform_data_fetcher_mac.h"
 
 #include "base/mac/foundation_util.h"
 #include "base/memory/scoped_nsobject.h"
 #include "base/string16.h"
 #include "base/string_util.h"
@@ skipping 283 matching lines @@
 void GamepadPlatformDataFetcherMac::GetGamepadData(
     WebKit::WebGamepads* pads,
     bool) {
   if (!enabled_) {
     pads->length = 0;
     return;
   }
 
   // Copy to the current state to the output buffer, using the mapping
   // function, if there is one available.
-  pads->length = data_.length;
+  pads->length = WebKit::WebGamepads::itemsLengthCap;
   for (size_t i = 0; i < WebKit::WebGamepads::itemsLengthCap; ++i) {
     if (associated_[i].mapper)
       associated_[i].mapper(data_.items[i], &pads->items[i]);
     else
       pads->items[i] = data_.items[i];
   }
 }
 
 }  // namespace content