Fix silent truncations when extracting values from CheckedNumeric

device/hid/hid_connection_mac.cc

Index: device/hid/hid_connection_mac.cc
diff --git a/device/hid/hid_connection_mac.cc b/device/hid/hid_connection_mac.cc
index cd62324e4a8b1bfe635aff86d468193692cf7135..4aa4a8f3c5bb565098edb2e7bf8e0c06c56fa3ca 100644
--- a/device/hid/hid_connection_mac.cc
+++ b/device/hid/hid_connection_mac.cc
@@ -136,12 +136,12 @@ void HidConnectionMac::InputReportCallback(void* context,
   scoped_refptr<net::IOBufferWithSize> buffer;
   if (connection->device_info()->has_report_id()) {
     // report_id is already contained in report_bytes
-    buffer = new net::IOBufferWithSize(
-        base::CheckedNumeric<size_t>(report_length).ValueOrDie());
+    buffer =
+        new net::IOBufferWithSize(base::checked_cast<size_t>(report_length));
     memcpy(buffer->data(), report_bytes, report_length);
   } else {
-    buffer = new net::IOBufferWithSize(
-        (base::CheckedNumeric<size_t>(report_length) + 1).ValueOrDie());
+    buffer = new net::IOBufferWithSize(static_cast<size_t>(
+        (base::CheckedNumeric<size_t>(report_length) + 1).ValueOrDie()));
     buffer->data()[0] = 0;
     memcpy(buffer->data() + 1, report_bytes, report_length);
   }