Set message on SMB file shares loading spinner.

BUG=972551,977313

Change-Id: Icdc9f46e31f779156ea66b4b3091f786150c08da
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1827266
Commit-Queue: Anand Mistry <amistry@chromium.org>
Reviewed-by: Michael Giuffrida <michaelpg@chromium.org>
Cr-Commit-Position: refs/heads/master@{#701438}

chrome/app/settings_strings.grdp

@@ -1758,6 +1758,9 @@
     <message name="IDS_SETTINGS_DOWNLOADS_ADD_SHARE_KERBEROS_AUTHENTICATION" desc="Authentication method option to use a users Kerberos ticket to authenticate. Only availible for Active Directory users.">
       SSO
     </message>
+    <message name="IDS_SETTINGS_DOWNLOADS_ADD_SHARE_DISCOVERY_MESSAGE" desc="The message shown next to the loading spinner shown when searching for SMB shares.">
+      Looking for file shares
+    </message>
   </if>
 
   <!-- Kerberos tickets -->

chrome/browser/ui/webui/chromeos/smb_shares/smb_shares_localized_strings_provider.cc

@@ -44,6 +44,8 @@ void AddLocalizedStrings(content::WebUIDataSource* html_source) {
        IDS_SETTINGS_DOWNLOADS_SHARE_ADDED_MOUNT_INVALID_URL_MESSAGE},
       {"smbShareAddedInvalidSSOURLMessage",
        IDS_SETTINGS_DOWNLOADS_SHARE_ADDED_MOUNT_INVALID_SSO_URL_MESSAGE},
+      {"smbShareDiscoveryMessage",
+       IDS_SETTINGS_DOWNLOADS_ADD_SHARE_DISCOVERY_MESSAGE},
   };
   AddLocalizedStringsBulk(html_source, kLocalizedStrings,
                           base::size(kLocalizedStrings));

ui/webui/resources/cr_components/chromeos/smb_shares/add_smb_share_dialog.html

@@ -77,7 +77,8 @@
             placeholder="\\server\share"
             error-message-allowed
             update-value-on-input autofocus
-            show-loading="[[discoveryActive_]]">
+            show-loading="[[discoveryActive_]]"
+            loading-message="[[i18n('smbShareDiscoveryMessage')]]">
         </cr-searchable-drop-down>
         <cr-input id="name" label="[[i18n('smbShareName')]]"
             value="{{mountName_}}" maxlength="64">