Warn user in case extension delays network traffic too much.

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.  The variables is_win, is_macosx, is_linux, and is_posix are available
 for making strings OS specific.  Other platform defines such as use_titlecase
 are declared in build/common.gypi.
 -->
 
 <grit base_dir="." latest_public_release="0" current_release="1"
@@ skipping 4097 matching lines @@
       <message name="IDS_EXTENSION_PROMPT_PERMISSIONS_BUTTON" desc="Text for the allow button on the extension permissions prompt">
         Allow
       </message>
       <message name="IDS_EXTENSION_PROMPT_PERMISSIONS_ABORT_BUTTON" desc="Text for the deny button on the extension permissions prompt">
         Deny
       </message>
       <message name="IDS_EXTENSION_WEB_STORE_TITLE" desc="Text for the Chrome Web Store">
         Web Store
       </message>
 
+      <!-- Global error messages for extensions -->
+      <message name="IDS_EXTENSION_WARNINGS_WRENCH_MENU_ITEM" desc="The wrench menu item indicating that extensions caused problems">
+        Misbehaving extension
+      </message>
+      <message name="IDS_EXTENSION_WARNINGS_TITLE" desc="The title of a section in chrome://extensions which contains the warning(s) that relates to one particular extension">
+        Warning:
+      </message>
+      <message name="IDS_EXTENSION_WARNINGS_NETWORK_DELAY" desc="Warning message indicating that an extension caused excessive network delays for web requests">
+        This extension is slowing down <ph name="PRODUCT_NAME">$1<ex>Google Chrome</ex></ph>. You should disable it to restore <ph name="PRODUCT_NAME">$1<ex>Google Chrome</ex></ph>'s performance.
+      </message>
+
       <!-- Plugins -->
       <message name="IDS_PLUGINS_TITLE" desc="Title for the chrome://plugins page.">
         Plug-ins
       </message>
       <message name="IDS_PLUGINS_DETAILS_MODE_LINK" desc="Text of the link for details mode.">
         Details
       </message>
       <message name="IDS_PLUGINS_NONE_INSTALLED" desc="Text that lets the user know that no plug-ins are installed.">
         No plug-ins installed.
       </message>
@@ skipping 9885 matching lines @@
     </messages>
     <structures fallback_to_english="true">
       <!-- Make sure these stay in sync with the structures in generated_resources.grd. -->
       <structure name="IDD_CHROME_FRAME_FIND_DIALOG" file="cf_resources.rc" type="dialog" >
       </structure>
       <structure name="IDD_CHROME_FRAME_READY_PROMPT" file="cf_resources.rc" type="dialog" >
       </structure>
     </structures>
   </release>
 </grit>