Move MessagePort implementation from android_webview to content

content/renderer/BUILD.gn

 # Copyright 2014 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/features.gni")
 import("//build/config/ui.gni")
 import("//media/media_options.gni")
 import("//third_party/webrtc/build/webrtc.gni")
 import("//tools/ipc_fuzzer/ipc_fuzzer.gni")
 
@@ skipping 12 matching lines @@
 
   sources = [
     "accessibility/blink_ax_enum_conversion.cc",
     "accessibility/blink_ax_enum_conversion.h",
     "accessibility/blink_ax_tree_source.cc",
     "accessibility/blink_ax_tree_source.h",
     "accessibility/render_accessibility_impl.cc",
     "accessibility/render_accessibility_impl.h",
     "android/address_detector.cc",
     "android/address_detector.h",
+    "android/app_web_message_port_client.cc",
+    "android/app_web_message_port_client.h",
     "android/content_detector.cc",
     "android/content_detector.h",
     "android/disambiguation_popup_helper.cc",
     "android/disambiguation_popup_helper.h",
     "android/email_detector.cc",
     "android/email_detector.h",
     "android/phone_number_detector.cc",
     "android/phone_number_detector.h",
     "android/renderer_date_time_picker.cc",
     "android/renderer_date_time_picker.h",
@@ skipping 860 matching lines @@
     # For the defines in mojo_media_config.
     public_configs = [ "//media/mojo/services:mojo_media_config" ]
   }
 
   if (!is_component_build) {
     public_deps = [
       ":renderer",
     ]
   }
 }