Add <extensionview>

extensions/extensions_strings.grd

 <?xml version="1.0" encoding="utf-8"?>
 
 <!--
   Strings for the extensions module. Used mostly for low-level error messages.
   Where possible new strings should be kept in Chrome and the extensions module
   should return an error code, message flag, etc.
 -->
 
 <grit latest_public_release="0" current_release="1"
       source_lang_id="en" enc_check="möl">
@@ skipping 377 matching lines @@
       </message>
       <message name="IDS_EXTENSION_PROMPT_WARNING_USB_DEVICE_LIST_ITEM_UNKNOWN_VENDOR" desc="Line item for a USB device listed under IDS_EXTENSION_PROMPT_WARNING_USB_DEVICE_LIST that has an unknown vendor ID.">
         devices from an unknown vendor
       </message>
       <message name="IDS_EXTENSION_TASK_MANAGER_APPVIEW_TAG_PREFIX" desc="The prefix for a guest page loaded in an appview tag in the Task Manager">
         Appview: <ph name="APPVIEW_TAG_NAME">$1<ex>Google Hangouts</ex></ph>
       </message>
       <message name="IDS_EXTENSION_TASK_MANAGER_EXTENSIONOPTIONS_TAG_PREFIX" desc="The prefix for a guest page loaded in an extensionoptions tag in the Task Manager">
         Options: <ph name="EXTENSIONOPTIONS_TAG_NAME">$1<ex>Google Hangouts</ex></ph>
       </message>
+      <message name="IDS_EXTENSION_TASK_MANAGER_EXTENSIONVIEW_TAG_PREFIX" desc="The prefix for a guest page loaded in an extensionview tag in the Task Manager">
+        ExtensionView: <ph name="EXTENSIONVIEW_TAG_NAME">$1<ex>Google Hangouts</ex></ph>
+      </message>
       <message name="IDS_EXTENSION_TASK_MANAGER_MIMEHANDLERVIEW_TAG_PREFIX" desc="The prefix for a guest page loaded in a mime handler view page in the task manager">
         Mimehandler: <ph name="MIMEHANDLERVIEW_TAG_NAME">$1<ex>My mime handler view</ex></ph>
       </message>
       <message name="IDS_EXTENSION_TASK_MANAGER_WEBVIEW_TAG_PREFIX" desc="The prefix for a guest page loaded in a webview tag in the Task Manager">
         Webview: <ph name="WEBVIEW_TAG_NAME">$1<ex>Google</ex></ph>
       </message>
       <message name="IDS_EXTENSION_TASK_MANAGER_SURFACEWORKER_TAG_PREFIX" desc="The prefix for a guest page loaded in an appview tag in the Task Manager">
         SurfaceWorker: <ph name="SURFACEWORKER_TAG_NAME">$1<ex>Google Hangouts</ex></ph>
       </message>
       <message name="IDS_EXTENSION_PROMPT_WARNING_USB_DEVICE_SERIAL" desc="Permission string for accessing a USB device with a known vendor name, product name and serial number.">
@@ skipping 28 matching lines @@
       <message name="IDS_EXTENSION_PROMPT_WARNING_U2F_DEVICES" desc="Warning message which indicates that an extension has access to Universal 2nd Factor devices.">
         Access your Universal 2nd Factor devices
       </message>
       <message name="IDS_EXTENSION_PROMPT_WARNING_WEB_CONNECTABLE" desc="Permission string for allowing websites to connect to extensions.">
         Communicate with cooperating websites
       </message>
 
     </messages>
   </release>
 </grit>