Apply gn format with 'sources' sorting to src/

third_party/npapi/BUILD.gn

 # Copyright 2014 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.
 
 config("npapi_config") {
   # Some things #include "bindings/npapi.h" and others just #include
   # "npapi.h". Account for both flavors.
   include_dirs = [
     ".",
     "bindings",
   ]
 }
 
 source_set("npapi") {
   # Just headers but this allows us to track dependencies on these.
   sources = [
     "bindings/npapi.h",
     "bindings/npapi_extensions.h",
     "bindings/npapi_x11.h",
     "bindings/npfunctions.h",
     "bindings/nphostapi.h",
+    "bindings/npruntime.h",
     "bindings/nptypes.h",
-    "bindings/npruntime.h",
   ]
 
   public_configs = [ ":npapi_config" ]
 }