PPAPI/NaCl: Move plugin_main.cc's contents into irt_ppapi.cc

ppapi/ppapi_proxy.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.
 
 {
   'target_defaults': {
     'variables': {
       'ppapi_proxy_target': 0,
     },
     'target_conditions': [
@@ skipping 246 matching lines @@
             'sources': [
               'nacl_irt/irt_interfaces.cc',
               'nacl_irt/irt_interfaces.h',
               'nacl_irt/irt_pnacl_translator_compile.cc',
               'nacl_irt/irt_pnacl_translator_link.cc',
               'nacl_irt/irt_ppapi.cc',
               'nacl_irt/irt_ppapi.h',
               'nacl_irt/irt_start.cc',
               'nacl_irt/manifest_service.cc',
               'nacl_irt/manifest_service.h',
-              'nacl_irt/plugin_main.cc',
-              'nacl_irt/plugin_main.h',
               'nacl_irt/plugin_startup.cc',
               'nacl_irt/plugin_startup.h',
               'nacl_irt/ppapi_dispatcher.cc',
               'nacl_irt/ppapi_dispatcher.h',
             ],
             'sources!': [
               'proxy/audio_input_resource.cc',
               'proxy/broker_dispatcher.cc',
               'proxy/browser_font_singleton_resource.cc',
               'proxy/device_enumeration_resource_helper.cc',
@@ skipping 22 matching lines @@
               'proxy/ppp_video_decoder_proxy.cc',
               'proxy/serialized_flash_menu.cc',
               'proxy/video_capture_resource.cc',
             ],
           }],
         ],
       }],
     ],
   },
 }