Fix -Wc++11-narrowing: services/

Bug: 1216696
Change-Id: I5869e4ef5756579ab3d96691555e795901e9228e
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2975076
Auto-Submit: Peter Kasting <pkasting@chromium.org>
Commit-Queue: Ken Rockot <rockot@google.com>
Reviewed-by: Ken Rockot <rockot@google.com>
Cr-Commit-Position: refs/heads/master@{#894371}

services/device/public/cpp/hid/hid_collection.cc

@@ -250,7 +250,7 @@ void HidCollection::GetMaxReportSizes(size_t* max_input_report_bits,
       }
       DCHECK_LE(report_bits, kMaxReasonableReportLengthBits);
       entry.max_report_bits =
-          std::max(entry.max_report_bits, size_t{report_bits});
+          std::max(entry.max_report_bits, static_cast<size_t>(report_bits));
     }
   }
 }