Introduce PPB_AudioInput_Dev v0.3 and refactor the device enumeration code:

content/content_renderer.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.
 
 {
   'dependencies': [
     '../jingle/jingle.gyp:jingle_glue',
     '../net/net.gyp:net',
     '../ppapi/ppapi_internal.gyp:ppapi_host',
     '../ppapi/ppapi_internal.gyp:ppapi_proxy',
@@ skipping 154 matching lines @@
     'renderer/paint_aggregator.h',
     'renderer/password_form_conversion_utils.cc',
     'renderer/pepper/content_renderer_pepper_host_factory.cc',
     'renderer/pepper/content_renderer_pepper_host_factory.h',
     'renderer/pepper/pepper_audio_input_host.cc',
     'renderer/pepper/pepper_audio_input_host.h',
     'renderer/pepper/pepper_broker_impl.cc',
     'renderer/pepper/pepper_broker_impl.h',
     'renderer/pepper/pepper_device_enumeration_event_handler.cc',
     'renderer/pepper/pepper_device_enumeration_event_handler.h',
+    'renderer/pepper/pepper_device_enumeration_host_helper.cc',
+    'renderer/pepper/pepper_device_enumeration_host_helper.h',
     'renderer/pepper/pepper_file_chooser_host.cc',
     'renderer/pepper/pepper_file_chooser_host.h',
     'renderer/pepper/pepper_flash_clipboard_host.cc',
     'renderer/pepper/pepper_flash_clipboard_host.h',
     'renderer/pepper/pepper_flash_host.cc',
     'renderer/pepper/pepper_flash_host.h',
     'renderer/pepper/pepper_graphics_2d_host.cc',
     'renderer/pepper/pepper_graphics_2d_host.h',
     'renderer/pepper/pepper_hung_plugin_filter.cc',
     'renderer/pepper/pepper_hung_plugin_filter.h',
@@ skipping 198 matching lines @@
     }],
   ],
   'target_conditions': [
     ['OS=="android"', {
       'sources/': [
         ['include', '^renderer/render_view_linux\\.cc$'],
       ],
     }],
   ],
 }