Prefix the files app document title with its localised name.

For example, when viewing Downloads, the title in English would be
"Files - Downloads".

Bug: 762691
Change-Id: Icb9047da7f5e635db2c845d15e98a3165286689f
Reviewed-on: https://chromium-review.googlesource.com/c/1345712
Commit-Queue: Sam McNally <sammc@chromium.org>
Reviewed-by: Luciano Pacheco <lucmult@chromium.org>
Cr-Commit-Position: refs/heads/master@{#609923}

chrome/browser/chromeos/extensions/file_manager/private_api_strings.cc

@@ -828,6 +828,7 @@ ExtensionFunction::ResponseAction FileManagerPrivateGetStringsFunction::Run() {
              IDS_FILE_BROWSER_ZIP_TARGET_EXISTS_ERROR);
   SET_STRING("ZIP_UNEXPECTED_ERROR", IDS_FILE_BROWSER_ZIP_UNEXPECTED_ERROR);
   SET_STRING("SEE_MENU_FOR_ACTIONS", IDS_FILE_BROWSER_SEE_MENU_FOR_ACTIONS);
+  SET_STRING("FILEMANAGER_APP_NAME", IDS_FILEMANAGER_APP_NAME);
 #undef SET_STRING
 
   dict->SetBoolean("PDF_VIEW_ENABLED",

ui/file_manager/file_manager/common/js/util.js

@@ -1214,7 +1214,7 @@ util.getRootTypeLabel = function(locationInfo) {
  * Returns the localized name of the entry.
  *
  * @param {EntryLocation} locationInfo
- * @param {!Entry} entry The entry to be retrieve the name of.
+ * @param {!Entry|!FakeEntry} entry The entry to be retrieve the name of.
  * @return {?string} The localized name.
  */
 util.getEntryLabel = function(locationInfo, entry) {

ui/file_manager/file_manager/foreground/js/main_window_component.js

@@ -455,9 +455,8 @@ MainWindowComponent.prototype.onDirectoryChanged_ = function(event) {
     if (this.dialogType_ === DialogType.FULL_PAGE) {
       var locationInfo = this.volumeManager_.getLocationInfo(event.newDirEntry);
       if (locationInfo) {
-        document.title = locationInfo.hasFixedLabel ?
-            util.getRootTypeLabel(locationInfo) :
-            event.newDirEntry.name;
+        const label = util.getEntryLabel(locationInfo, event.newDirEntry);
+        document.title = `${str('FILEMANAGER_APP_NAME')} - ${label}`;
       } else {
         console.error('Could not find location info for entry: '
                       + event.newDirEntry.fullPath);