Refactor the Photo Editor to enable new feature work

chrome/browser/resources/file_manager/js/file_manager.js

Index: chrome/browser/resources/file_manager/js/file_manager.js
diff --git a/chrome/browser/resources/file_manager/js/file_manager.js b/chrome/browser/resources/file_manager/js/file_manager.js
index 6315a1d12a8fe7f3336abf44942d8df453a744f6..432d648b017d36b4194cbd678a1916bd82eff9f1 100644
--- a/chrome/browser/resources/file_manager/js/file_manager.js
+++ b/chrome/browser/resources/file_manager/js/file_manager.js
@@ -1486,10 +1486,10 @@ FileManager.prototype = {
           // 2. Reloading a Gallery page. Must be an image or a video file.
           // 3. A user manually entered a URL pointing to a file.
           if (FileType.isImageOrVideo(path)) {
-            tasks.execute(self.getExtensionId() + '|gallery');
+            tasks.execute(util.getExtensionId() + '|gallery');
           } else if (FileType.getMediaType(path) == 'archive') {
             self.show_();
-            tasks.execute(self.getExtensionId() + '|mount-archive');
+            tasks.execute(util.getExtensionId() + '|mount-archive');
           } else {
             self.show_();
             return;
@@ -2401,10 +2401,6 @@ FileManager.prototype = {
     return this.directoryModel_.getCurrentRootType() === RootType.GDATA;
   };
 
-  FileManager.prototype.getExtensionId = function() {
-    return chrome.extension.getURL('').split('/')[2];
-  };
-
   FileManager.prototype.onExternalLinkClick_ = function(url) {
     chrome.tabs.create({url: url});
     if (this.dialogType_ != FileManager.DialogType.FULL_PAGE) {