Adding a confirmation dialog for It2Me on Mac

remoting/host/it2me/BUILD.gn

Index: remoting/host/it2me/BUILD.gn
diff --git a/remoting/host/it2me/BUILD.gn b/remoting/host/it2me/BUILD.gn
index c86ff54228f14c30c19ce235976a6ec80c3efa06..4d1be24e3afba0275a09bb0f315090c54e924180 100644
--- a/remoting/host/it2me/BUILD.gn
+++ b/remoting/host/it2me/BUILD.gn
@@ -21,7 +21,7 @@ source_set("common") {
     "it2me_confirmation_dialog.h",
     "it2me_confirmation_dialog_android.cc",
     "it2me_confirmation_dialog_linux.cc",
-    "it2me_confirmation_dialog_mac.cc",
+    "it2me_confirmation_dialog_mac.mm",
     "it2me_confirmation_dialog_proxy.cc",
     "it2me_confirmation_dialog_proxy.h",
     "it2me_confirmation_dialog_win.cc",
@@ -134,6 +134,16 @@ if (!is_chromeos && !is_android && enable_remoting_host) {
     if (is_mac) {
       app_target_type = "mac_app_bundle"
 
+      bundle_data("remote_assistance_host_dialog_icon") {
+        sources = [
+          "//remoting/resources/chromoting128.png",
+        ]
+
+        outputs = [
+          "{{bundle_resources_dir}}/{{source_file_part}}",
+        ]
+      }
+
       # remote_assistance_host-InfoPlist.strings
       foreach(locale, remoting_locales_with_underscores) {
         bundle_data("remote_assistance_host_strings_${locale}_bundle_data") {
@@ -216,6 +226,7 @@ if (!is_chromeos && !is_android && enable_remoting_host) {
           ]
         }
         deps += [
+          ":remote_assistance_host_dialog_icon",
           ":remote_assistance_host_xibs",
           "//remoting/host:remoting_infoplist_strings",
           "//remoting/resources:copy_locales",