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

ppapi/proxy/BUILD.gn

 # Copyright 2015 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.
 
 import("//build/config/nacl/config.gni")
 
 config("proxy_implementation") {
   defines = [ "PPAPI_PROXY_IMPLEMENTATION" ]
 }
 
@@ skipping 191 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",
     ]
   } else {
     sources += [
       "audio_input_resource.cc",
       "audio_input_resource.h",
       "broker_dispatcher.cc",
@@ skipping 144 matching lines @@
   deps = [
     "//base/test:test_support",
     "//ipc",
     "//ipc:test_support",
     "//ppapi/proxy",
     "//ppapi/shared_impl",
     "//testing/gmock",
     "//testing/gtest",
   ]
 }