Add the new content widget including localised title.

ios/chrome/app/BUILD.gn

 # Copyright 2015 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/ios/rules.gni")
 import("//build/config/mac/base_rules.gni")
 import("//build/mac/tweak_info_plist.gni")
 import("//ios/build/chrome_build.gni")
 import("//ios/public/provider/chrome/browser/build_config.gni")
 
@@ skipping 262 matching lines @@
 
   bundle_deps = [ "//ios/chrome/app/resources" ]
 
   if (current_toolchain == default_toolchain) {
     if (ios_enable_today_extension) {
       deps += [ ":today_extension_bundle" ]
     }
     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" ]
     }
   }
 
   extra_substitutions = [
     "CHROMIUM_BUNDLE_ID=$chromium_bundle_id",
     "CHROMIUM_HANDOFF_ID=$chromium_handoff_id",
     "CHROMIUM_SHORT_NAME=$chromium_short_name",
     "CHROMIUM_URL_SCHEME_1=$url_unsecure_scheme",
@@ skipping 17 matching lines @@
       ]
       sources = [
         "$root_out_dir/today_extension.appex",
       ]
       outputs = [
         "{{bundle_plugins_dir}}/{{source_file_part}}",
       ]
     }
   }
 
+  if (ios_enable_content_widget_extension) {
+    bundle_data("content_widget_extension_bundle") {
+      public_deps = [
+        "//ios/chrome/content_widget_extension",
+      ]
+      sources = [
+        "$root_out_dir/content_widget_extension.appex",
+      ]
+      outputs = [
+        "{{bundle_plugins_dir}}/{{source_file_part}}",
+      ]
+    }
+  }
+
   if (ios_enable_search_widget_extension) {
     bundle_data("search_widget_extension_bundle") {
       public_deps = [
         "//ios/chrome/search_widget_extension",
       ]
       sources = [
         "$root_out_dir/search_widget_extension.appex",
       ]
       outputs = [
         "{{bundle_plugins_dir}}/{{source_file_part}}",
       ]
     }
   }
 
   if (ios_enable_share_extension) {
     bundle_data("share_extension_bundle") {
       public_deps = [
         "//ios/chrome/share_extension",
       ]
       sources = [
         "$root_out_dir/share_extension.appex",
       ]
       outputs = [
         "{{bundle_plugins_dir}}/{{source_file_part}}",
       ]
     }
   }
 }