Move MessagePort implementation from android_webview to content

android_webview/BUILD.gn

Index: android_webview/BUILD.gn
diff --git a/android_webview/BUILD.gn b/android_webview/BUILD.gn
index 3ef9827564cf4e2c263efb89885ac196e3fe5695..5149149fe3a656d89d1e63b5b39a4108deb1e66a 100644
--- a/android_webview/BUILD.gn
+++ b/android_webview/BUILD.gn
@@ -486,9 +486,6 @@ source_set("common") {
     "browser/aw_locale_manager.h",
     "browser/aw_login_delegate.cc",
     "browser/aw_login_delegate.h",
-    "browser/aw_message_port_message_filter.cc",
-    "browser/aw_message_port_message_filter.h",
-    "browser/aw_message_port_service.h",
     "browser/aw_metrics_service_client.cc",
     "browser/aw_metrics_service_client.h",
     "browser/aw_permission_manager.cc",
@@ -583,7 +580,6 @@ source_set("common") {
     "common/aw_hit_test_data.h",
     "common/aw_media_client_android.cc",
     "common/aw_media_client_android.h",
-    "common/aw_message_port_messages.h",
     "common/aw_resource.h",
     "common/aw_switches.cc",
     "common/aw_switches.h",
@@ -609,8 +605,6 @@ source_set("common") {
     "renderer/aw_content_settings_client.h",
     "renderer/aw_key_systems.cc",
     "renderer/aw_key_systems.h",
-    "renderer/aw_message_port_client.cc",
-    "renderer/aw_message_port_client.h",
     "renderer/aw_print_web_view_helper_delegate.cc",
     "renderer/aw_print_web_view_helper_delegate.h",
     "renderer/aw_render_frame_ext.cc",
@@ -715,8 +709,6 @@ android_library("android_webview_java") {
     "java/src/org/chromium/android_webview/AwGLFunctor.java",
     "java/src/org/chromium/android_webview/AwHttpAuthHandler.java",
     "java/src/org/chromium/android_webview/AwLayoutSizer.java",
-    "java/src/org/chromium/android_webview/AwMessagePort.java",
-    "java/src/org/chromium/android_webview/AwMessagePortService.java",
     "java/src/org/chromium/android_webview/AwMetricsServiceClient.java",
     "java/src/org/chromium/android_webview/AwNetworkChangeNotifierRegistrationPolicy.java",
     "java/src/org/chromium/android_webview/AwPdfExporter.java",
@@ -752,7 +744,6 @@ android_library("android_webview_java") {
     "java/src/org/chromium/android_webview/NullAwViewMethods.java",
     "java/src/org/chromium/android_webview/OverScrollGlow.java",
     "java/src/org/chromium/android_webview/PlatformServiceBridge.java",
-    "java/src/org/chromium/android_webview/PostMessageSender.java",
     "java/src/org/chromium/android_webview/PopupTouchHandleDrawable.java",
     "java/src/org/chromium/android_webview/ResourcesContextWrapperFactory.java",
     "java/src/org/chromium/android_webview/ScrollAccessibilityHelper.java",