[Extensions] Polish the suspicious extension bubble

chrome/app/chromium_strings.grd

Index: chrome/app/chromium_strings.grd
diff --git a/chrome/app/chromium_strings.grd b/chrome/app/chromium_strings.grd
index 4d67e1cc3cec4c53a1d3756864690980794ad09e..e06aea0bfd1ef8d8d436c46e82b75ba41929d5db 100644
--- a/chrome/app/chromium_strings.grd
+++ b/chrome/app/chromium_strings.grd
@@ -784,9 +784,12 @@ For Chromium, processes used to display diagnostics information (such as this "a
       </message>
 
       <if expr="enable_extensions">
-        <message name="IDS_EXTENSIONS_UNSUPPORTED_DISABLED_BODY" desc="Body of the dialog shown when unsupported extensions have been disabled">
+        <message name="IDS_EXTENSIONS_MULTIPLE_UNSUPPORTED_DISABLED_BODY" desc="Body of the dialog shown when multiple unsupported extensions have been disabled.">
           To make Chromium safer, we disabled some extensions that aren't listed in the <ph name="IDS_EXTENSION_WEB_STORE_TITLE">$1<ex>Chrome Web Store</ex></ph> and may have been added without your knowledge.
         </message>
+        <message name="IDS_EXTENSIONS_SINGLE_UNSUPPORTED_DISABLED_BODY" desc="Body of the dialog shown when a single unsupported extension has been disabled.">
+          To make Chromium safer, we disabled the following extension that isn't listed in the <ph name="IDS_EXTENSION_WEB_STORE_TITLE">$1<ex>Chrome Web Store</ex></ph> and may have been added without your knowledge.
+        </message>
       </if>
 
       <!-- Main Chrome menu -->