Add the new content widget including localised title.

ios/chrome/app/BUILD.gn

Index: ios/chrome/app/BUILD.gn
diff --git a/ios/chrome/app/BUILD.gn b/ios/chrome/app/BUILD.gn
index dada6e635f44b948d5e23b5cadff5e76bb9e3513..5a354800a0f64be092a1538ddaf83d3ff3fca1eb 100644
--- a/ios/chrome/app/BUILD.gn
+++ b/ios/chrome/app/BUILD.gn
@@ -280,6 +280,9 @@ ios_app_bundle("chrome") {
     if (ios_enable_search_widget_extension) {
       deps += [ ":search_widget_extension_bundle" ]
     }
+    if (ios_enable_content_widget_extension) {
+      deps += [ ":content_widget_extension_bundle" ]
+    }
     if (ios_enable_share_extension) {
       deps += [ ":share_extension_bundle" ]
     }
@@ -317,6 +320,20 @@ if (current_toolchain == default_toolchain) {
     }
   }
 
+  if (ios_enable_content_widget_extension) {
+    bundle_data("content_widget_extension_bundle") {
+      public_deps = [
+        "//ios/chrome/content_widget_extension",
+      ]
+      sources = [
+        "$root_out_dir/content_widget_extension.appex",
+      ]
+      outputs = [
+        "{{bundle_plugins_dir}}/{{source_file_part}}",
+      ]
+    }
+  }
+
   if (ios_enable_search_widget_extension) {
     bundle_data("search_widget_extension_bundle") {
       public_deps = [