[fsp] Add notifications in case of slow operations.

chrome/app/chromeos_strings.grdp

 <?xml version="1.0" encoding="utf-8"?>
 <!-- ChromeOS-specific strings (included from generated_resources.grd).
      Everything in this file is wrapped in <if expr="chromeos">. -->
 <grit-part>
   <message name="IDS_EMPTY_STRING" desc="Empty string, exist only to make code generic. No translation required.">
   </message>
   <message name="IDS_CHROMEBOOK" desc="The localized name for Chromebook.">
     Chromebook
   </message>
   <message name="IDS_CHROMEBOX" desc="The localized name for Chromebox">
@@ skipping 120 matching lines @@
   </message>
   <message name="IDS_FLAGS_FILE_MANAGER_ENABLE_NEW_AUDIO_PLAYER_DESCRIPTION" desc="Description of the about:flag option to the enable new audio player app.">
     Use the experimental new audio player instead of the stable one.
   </message>
   <message name="IDS_FLAGS_FILE_MANAGER_ENABLE_NEW_GALLERY_NAME" desc="Name of the about:flag option to enable the new gallery app.">
     Enable the new gallery
   </message>
   <message name="IDS_FLAGS_FILE_MANAGER_ENABLE_NEW_GALLERY_DESCRIPTION" desc="Description of the about:flag option to the enable new gallery app.">
     Use the experimental new gallery instead of the stable one.
   </message>
+  <message name="IDS_FILE_SYSTEM_PROVIDER_UNRESPONSIVE_WARNING" desc="A warning shown in a notification that an operation is taking longer than expected.">
+    An operation is taking longer than expected. Do you want to abort it?
+  </message>
+  <message name="IDS_FILE_SYSTEM_PROVIDER_MANY_UNRESPONSIVE_WARNING" desc="A warning shown in a notification that more than one operations are taking longer than expected.">
+    Some operations are taking longer than expected. Do you want to abort them?
+  </message>
+  <message name="IDS_FILE_SYSTEM_PROVIDER_UNRESPONSIVE_ABORT_BUTTON" desc="Label of the button on the notification about an operation(s) taking to long.">
+    Abort
+  </message>
   <message name="IDS_FILE_BROWSER_ARCHIVE_DIRECTORY_LABEL" desc="/archive directory label.">
     Archives
   </message>
   <message name="IDS_FILE_BROWSER_REMOVABLE_DIRECTORY_LABEL" desc="/removable directory label.">
     External Storage
   </message>
   <message name="IDS_FILE_BROWSER_DRIVE_DIRECTORY_LABEL" desc="/drive directory label.">
     Google Drive
   </message>
   <message name="IDS_FILE_BROWSER_DRIVE_MY_DRIVE_LABEL" desc="A label for the 'My Drive' collection of Google Drive.">
@@ skipping 5332 matching lines @@
   <message name="IDS_SET_TIME_BUTTON_CLOSE" desc="Text for the button to close the window.">
     Done
   </message>
   <message name="IDS_SET_TIME_DATE_LABEL" desc="Label for the date input element.">
     System date
   </message>
   <message name="IDS_SET_TIME_TIME_LABEL" desc="Label for the time input element.">
     System time
   </message>
 </grit-part>