Gamepad: Don't emit BOM in Gamepad ID.

content/browser/gamepad/gamepad_platform_data_fetcher_mac.mm

Index: content/browser/gamepad/gamepad_platform_data_fetcher_mac.mm
diff --git a/content/browser/gamepad/gamepad_platform_data_fetcher_mac.mm b/content/browser/gamepad/gamepad_platform_data_fetcher_mac.mm
index 84bad06f7707fc730bcb13f1d79fb0478e03da46..b9356f2454a87fac23d73f9c09d032a811c7077e 100644
--- a/content/browser/gamepad/gamepad_platform_data_fetcher_mac.mm
+++ b/content/browser/gamepad/gamepad_platform_data_fetcher_mac.mm
@@ -217,7 +217,7 @@ void GamepadPlatformDataFetcherMac::DeviceAdd(IOHIDDeviceRef device) {
       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);