Gamepad: Don't emit BOM in Gamepad ID.

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 199 matching lines @@
   snprintf(product_as_str, sizeof(product_as_str), "%04x", product_int);
   associated_[slot].mapper =
       GetGamepadStandardMappingFunction(vendor_as_str, product_as_str);
 
   NSString* ident = [NSString stringWithFormat:
       @"%@ (%sVendor: %04x Product: %04x)",
       product,
       associated_[slot].mapper ? "STANDARD GAMEPAD " : "",
       vendor_int,
       product_int];
-  NSData* as16 = [ident dataUsingEncoding:NSUTF16StringEncoding];
+  NSData* as16 = [ident dataUsingEncoding:NSUTF16LittleEndianStringEncoding];
 
   const size_t kOutputLengthBytes = sizeof(data_.items[slot].id);
   memset(&data_.items[slot].id, 0, kOutputLengthBytes);
   [as16 getBytes:data_.items[slot].id
           length:kOutputLengthBytes - sizeof(WebKit::WebUChar)];
 
   base::mac::ScopedCFTypeRef<CFArrayRef> elements(
       IOHIDDeviceCopyMatchingElements(device, NULL, kIOHIDOptionsTypeNone));
   AddButtonsAndAxes(CFToNSCast(elements), slot);
 
@@ skipping 73 matching lines @@
   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