Move MessagePort implementation from android_webview to content

android_webview/lib/main/aw_main_delegate.cc

Index: android_webview/lib/main/aw_main_delegate.cc
diff --git a/android_webview/lib/main/aw_main_delegate.cc b/android_webview/lib/main/aw_main_delegate.cc
index 9d693fee6b4b498d615a3dde04457e4099907988..53abf193dce7cbd5ba513b84cb2bc1faaa4240e9 100644
--- a/android_webview/lib/main/aw_main_delegate.cc
+++ b/android_webview/lib/main/aw_main_delegate.cc
@@ -18,7 +18,6 @@
 #include "android_webview/lib/aw_browser_dependency_factory_impl.h"
 #include "android_webview/native/aw_locale_manager_impl.h"
 #include "android_webview/native/aw_media_url_interceptor.h"
-#include "android_webview/native/aw_message_port_service_impl.h"
 #include "android_webview/native/aw_quota_manager_bridge_impl.h"
 #include "android_webview/native/aw_web_contents_view_delegate.h"
 #include "android_webview/native/aw_web_preferences_populater_impl.h"
@@ -262,10 +261,6 @@ AwWebPreferencesPopulater* AwMainDelegate::CreateWebPreferencesPopulater() {
   return new AwWebPreferencesPopulaterImpl();
 }
 
-AwMessagePortService* AwMainDelegate::CreateAwMessagePortService() {
-  return new AwMessagePortServiceImpl();
-}
-
 AwLocaleManager* AwMainDelegate::CreateAwLocaleManager() {
   return new AwLocaleManagerImpl();
 }