Fix wording of "plug-in".

chrome/app/generated_resources.grd

 <?xml version="1.0" encoding="UTF-8"?>
 
 <!-- This file contains definitions of resources that will be translated for
 each locale. -->
 
 <grit base_dir="." latest_public_release="0" current_release="1"
       source_lang_id="en" enc_check="möl">
   <outputs>
     <output filename="grit/generated_resources.h" type="rc_header">
       <emit emit_type='prepend'></emit>
@@ skipping 3446 matching lines @@
       <message name="IDS_EXTENSION_LOAD_JAVASCRIPT_FAILED" desc="">
         Could not load javascript '<ph name="RELATIVE_PATH">$1<ex>javas.js</ex></ph>' for content script.
       </message>
       <message name="IDS_EXTENSION_LOAD_CSS_FAILED" desc="">
         Could not load css '<ph name="RELATIVE_PATH">$1<ex>file.css</ex></ph>' for content script.
       </message>
       <message name="IDS_EXTENSION_BAD_FILE_ENCODING" desc="">
         Could not load file '<ph name="RELATIVE_PATH">$1<ex>file.js</ex></ph>' for content script. It isn't UTF-8 encoded.
       </message>
       <message name="IDS_EXTENSION_LOAD_PLUGIN_PATH_FAILED" desc="">
-        Could not load '<ph name="PLUGIN_PATH">$1<ex>/path/to/file</ex></ph>' for plugin.
+        Could not load '<ph name="PLUGIN_PATH">$1<ex>/path/to/file</ex></ph>' for plug-in.
       </message>
       <message name="IDS_EXTENSION_LOAD_ICON_FOR_PAGE_ACTION_FAILED" desc="">
         Could not load icon '<ph name="ICON">$1<ex>icon.png</ex></ph>' for page action.
       </message>
       <message name="IDS_EXTENSION_LOAD_ICON_FOR_BROWSER_ACTION_FAILED" desc="">
         Could not load icon '<ph name="ICON">$1<ex>icon.png</ex></ph>' for browser action.
       </message>
       <message name="IDS_EXTENSION_LOAD_BACKGROUND_PAGE_FAILED" desc="">
         Could not load background page '<ph name="BACKGROUND_PAGE">$1<ex>page.html</ex></ph>'.
       </message>
@@ skipping 5199 matching lines @@
 
     </messages>
 
     <structures first_id="50000" fallback_to_english="true">
       <structure name="IDD_CHROME_FRAME_FIND_DIALOG" file="cf_resources.rc" type="dialog" >
       </structure>
     </structures>
 
   </release>
 </grit>