Pepper: Add an example/test plugin for audio input (a.k.a. microphone).

ppapi/ppapi_tests.gypi

 # Copyright (c) 2011 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_example',
       'dependencies': [
         'ppapi.gyp:ppapi_cpp'
@@ skipping 291 matching lines @@
       'target_name': 'ppapi_example_audio',
       'dependencies': [
         'ppapi_example_skeleton',
         'ppapi.gyp:ppapi_cpp',
       ],
       'sources': [
         'examples/audio/audio.cc',
       ],
     },
     {
+      'target_name': 'ppapi_example_audio_input',
+      'dependencies': [
+        'ppapi_example_skeleton',
+        'ppapi.gyp:ppapi_cpp',
+      ],
+      'sources': [
+        'examples/audio_input/audio_input.cc',
+      ],
+    },
+    {
       'target_name': 'ppapi_example_file_chooser',
       'dependencies': [
         'ppapi_example_skeleton',
         'ppapi.gyp:ppapi_cpp',
       ],
       'sources': [
         'examples/file_chooser/file_chooser.cc',
       ],
     },
     {
@@ skipping 184 matching lines @@
               # Var_deprecated fails in TestPassReference, and we probably won't
               # fix it.
               #'tests/test_var_deprecated.cc'
             ],
           },
         },
       ],
     }],
   ],
 }