Change butter bar message depending on the type of operation and the number of files.

chrome/browser/resources/file_manager/js/mock_chrome.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.
 
 function MockEventSource() {
   this.listeners_ = [];
 }
 
 /**
  * Add a listener.
@@ skipping 565 matching lines @@
       HOSTED_OFFLINE_MESSAGE: 'You must be online to access this file.',
       HOSTED_OFFLINE_MESSAGE_PLURAL: 'You must be online to access these files.',
 
       CONFIRM_MOBILE_DATA_USE: 'Fetching this file will use approximately $1 of mobile data.',
       CONFIRM_MOBILE_DATA_USE_PLURAL: 'Fetching these files will use approximately $1 of mobile data.',
 
       GDOC_DOCUMENT_FILE_TYPE: 'Google document',
       GSHEET_DOCUMENT_FILE_TYPE: 'Google spreadsheet',
       GSLIDES_DOCUMENT_FILE_TYPE: 'Google presentation',
 
-      PASTE_ITEMS_REMAINING: 'Transferring $1 items',
-      PASTE_CANCELLED: 'Transfer cancelled.',
-      PASTE_TARGET_EXISTS_ERROR: 'Transfer failed, item exists: "$1"',
-      PASTE_FILESYSTEM_ERROR: 'Transfer failed. $1',
-      PASTE_UNEXPECTED_ERROR: 'Transfer failed, unexpected error: $1',
+      TRANSFER_ITEMS_REMAINING: 'Transferring $1 items',
+      TRANSFER_CANCELLED: 'Transfer cancelled.',
+      TRANSFER_TARGET_EXISTS_ERROR: 'Transfer failed, item exists: "$1"',
+      TRANSFER_FILESYSTEM_ERROR: 'Transfer failed. $1',
+      TRANSFER_UNEXPECTED_ERROR: 'Transfer failed, unexpected error: $1',
+      COPY_FILE_NAME: 'Copying $1',
+      COPY_ITEMS_REMAINING: 'Copying $1 items.',
+      COPY_CANCELLED: 'Copy operation cancelled.',
+      COPY_TARGET_EXISTS_ERROR: 'Copy operation failed, item exists: "$1"',
+      COPY_FILESYSTEM_ERROR: 'Copy operation failed. $1',
+      COPY_UNEXPECTED_ERROR: 'Copy operation failed, unexpected error: $1',
+      MOVE_FILE_NAME: 'Moving $1',
+      MOVE_ITEMS_REMAINING: 'Moving $1 items.',
+      MOVE_CANCELLED: 'Move cancelled.',
+      MOVE_TARGET_EXISTS_ERROR: 'Move failed, item exists: "$1"',
+      MOVE_FILESYSTEM_ERROR: 'Move failed. $1',
+      MOVE_UNEXPECTED_ERROR: 'Move failed, unexpected error: $1',
 
       CANCEL_LABEL: 'Cancel',
       OPEN_LABEL: 'Open',
       SAVE_LABEL: 'Save',
       OK_LABEL: 'OK',
       NO_ACTION_FOR_FILE: 'This file type is not supported. Please visit the ' +
           '<a target=\'_blank\' href=\'$1\'>Chrome Web Store</a>' +
           ' to find an app that can open this type of file.' +
           ' <a target=\'_blank\' href=\'$2\'>Learn More.</a>',
 
@@ skipping 200 matching lines @@
 
   setWindowHeight: function(height) {
     this.popup_.style.height = height + 'px';
   },
 
   closeWindow: function() {
     this.popup_.parentNode.removeChild(this.popup_);
     this.popup_ = null;
   }
 };