[Files.app] Skip non file manager window in checking existing file manager instance

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

 // Copyright (c) 2012 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.
 
 'use strict';
 
 /**
  * Number of runtime errors catched in the background page.
  * @type {number}
  */
@@ skipping 356 matching lines @@
   var type = opt_type || LaunchType.ALWAYS_CREATE;
 
   // Wait until all windows are created.
   background.queue.run(function(onTaskCompleted) {
     // Check if there is already a window with the same path. If so, then
     // reuse it instead of opening a new one.
     if (type == LaunchType.FOCUS_SAME_OR_CREATE ||
         type == LaunchType.FOCUS_ANY_OR_CREATE) {
       if (opt_appState && opt_appState.defaultPath) {
         for (var key in background.appWindows) {
+          if (!key.match(FILES_ID_PATTERN))
+            continue;
+
           var contentWindow = background.appWindows[key].contentWindow;
           if (contentWindow.appState &&
               opt_appState.defaultPath == contentWindow.appState.defaultPath) {
             background.appWindows[key].focus();
             if (opt_callback)
               opt_callback(key);
             onTaskCompleted();
             return;
           }
         }
       }
     }
 
     // Focus any window if none is focused. Try restored first.
     if (type == LaunchType.FOCUS_ANY_OR_CREATE) {
       // If there is already a focused window, then finish.
       for (var key in background.appWindows) {
+        if (!key.match(FILES_ID_PATTERN))
+          continue;
+
         // The isFocused() method should always be available, but in case
         // Files.app's failed on some error, wrap it with try catch.
         try {
           if (background.appWindows[key].contentWindow.isFocused()) {
             if (opt_callback)
               opt_callback(key);
             onTaskCompleted();
             return;
           }
         } catch (e) {
           console.error(e.message);
         }
       }
       // Try to focus the first non-minimized window.
       for (var key in background.appWindows) {
+        if (!key.match(FILES_ID_PATTERN))
+          continue;
+
         if (!background.appWindows[key].isMinimized()) {
           background.appWindows[key].focus();
           if (opt_callback)
             opt_callback(key);
           onTaskCompleted();
           return;
         }
       }
       // Restore and focus any window.
       for (var key in background.appWindows) {
+        if (!key.match(FILES_ID_PATTERN))
+          continue;
+
         background.appWindows[key].focus();
         if (opt_callback)
           opt_callback(key);
         onTaskCompleted();
         return;
       }
     }
 
     // Create a new instance in case of ALWAYS_CREATE type, or as a fallback
     // for other types.
@@ skipping 224 matching lines @@
     contexts: ['launcher'],
     title: str('NEW_WINDOW_BUTTON_LABEL')
   });
 };
 
 /**
  * Singleton instance of Background.
  * @type {Background}
  */
 window.background = new Background();