Add some remoting targets to GN build.

extensions/browser/BUILD.gn

Index: extensions/browser/BUILD.gn
diff --git a/extensions/browser/BUILD.gn b/extensions/browser/BUILD.gn
index 954ba9b2c9f381565b90b954a30aaf3efa7d0d47..c5efaccfe41ff757c6db11f285fac2250a659321 100644
--- a/extensions/browser/BUILD.gn
+++ b/extensions/browser/BUILD.gn
@@ -41,6 +41,7 @@ source_set("browser") {
       "api/app_view/app_view_internal_api.h",
       "api/async_api_function.cc",
       "api/async_api_function.h",
+      "api/cast_channel/cast_auth_util.cc",
       "api/cast_channel/cast_auth_util.h",
       "api/cast_channel/cast_channel_api.cc",
       "api/cast_channel/cast_channel_api.h",
@@ -216,6 +217,24 @@ source_set("browser") {
       "file_reader.h",
       "granted_file_entry.cc",
       "granted_file_entry.h",
+      "guest_view/guest_view_base.cc",
+      "guest_view/guest_view_base.h",
+      "guest_view/guest_view_constants.cc",
+      "guest_view/guest_view_constants.h",
+      "guest_view/guest_view_manager_factory.h",
+      "guest_view/guest_view_manager.cc",
+      "guest_view/guest_view_manager.h",
+      "guest_view/guest_view.h",
+      "guest_view/app_view/app_view_constants.cc",
+      "guest_view/app_view/app_view_constants.h",
+      "guest_view/app_view/app_view_guest.cc",
+      "guest_view/app_view/app_view_guest.h",
+      "guest_view/app_view/app_view_guest_delegate.cc",
+      "guest_view/app_view/app_view_guest_delegate.h",
+      "guest_view/web_view/web_view_permission_helper_delegate.cc",
+      "guest_view/web_view/web_view_permission_helper_delegate.h",
+      "guest_view/web_view/web_view_guest_delegate.cc",
+      "guest_view/web_view/web_view_guest_delegate.h",
       "image_loader.cc",
       "image_loader.h",
       "image_loader_factory.cc",