Sort GYP and GN files under ppapi

ppapi/ppapi_tests.gypi

 # 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.
 
 {
   'targets': [
     {
       'target_name': 'ppapi_tests',
       'type': 'loadable_module',
       'include_dirs': [
@@ skipping 458 matching lines @@
       'target_name': 'ppapi_example_video_decode',
       'dependencies': [
         'ppapi_example_skeleton',
         'ppapi.gyp:ppapi_cpp',
         'ppapi.gyp:ppapi_gles2',
       ],
       'include_dirs': [
         'lib/gl/include',
       ],
       'sources': [
+        'examples/video_decode/testdata.h',
         'examples/video_decode/video_decode.cc',
-        'examples/video_decode/testdata.h',
       ],
     },
     {
       # GN version: //ppapi/examples/video_decode:dev
       'target_name': 'ppapi_example_video_decode_dev',
       'dependencies': [
         'ppapi_example_skeleton',
         'ppapi.gyp:ppapi_cpp',
         'ppapi.gyp:ppapi_gles2',
       ],
       'include_dirs': [
         'lib/gl/include',
       ],
       'sources': [
+        'examples/video_decode/testdata.h',
         'examples/video_decode/video_decode_dev.cc',
-        'examples/video_decode/testdata.h',
       ],
     },
     {
       # GN version: //ppapi/example/video_capture
       'target_name': 'ppapi_example_vc',
       'dependencies': [
         'ppapi_example_skeleton',
         'ppapi.gyp:ppapi_cpp',
         'ppapi.gyp:ppapi_gles2',
       ],
@@ skipping 105 matching lines @@
       'sources': [
         'examples/compositor/compositor.cc',
         'examples/compositor/spinning_cube.cc',
         'examples/compositor/spinning_cube.h',
       ],
     },
     # Adding a new PPAPI example? Don't forget to update the GN build.
     # See //ppapi/examples/BUILD.gn
   ],
 }