Print preview: Display a dummy page when a user visits chrome://print directly.

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 6584 matching lines @@
       </message>
       <message name="IDS_PRINT_PREVIEW_BOTTOM_MARGIN_LABEL" desc="ARIA label used by screen reader to explain the purpose of the bottom margin textbox.">
         Bottom margin
       </message>
       <message name="IDS_PRINT_PREVIEW_LEFT_MARGIN_LABEL" desc="ARIA label used by screen reader to explain the purpose of the left margin textbox.">
         Left margin
       </message>
       <message name="IDS_PRINT_PREVIEW_RIGHT_MARGIN_LABEL" desc="ARIA label used by screen reader to explain the purpose of the right margin textbox.">
         Right margin
       </message>
+      <message name="IDS_PRINT_PREVIEW_INTENTIONALLY_BLANK" desc="silly message seen in many technical manuals on blank pages.">
+        This page is intentionally left blank.
+      </message>
 
       <!-- Load State -->
       <message name="IDS_LOAD_STATE_WAITING_FOR_DELEGATE">
         Waiting for <ph name="LOAD_STATE_PARAMETER">$1<ex>extension Adblock</ex></ph>...
       </message>
       <message name="IDS_LOAD_STATE_PARAMETER_EXTENSION" desc="Parameter to IDS_LOAD_STATE_WAITING_FOR_DELEGATE when we are waiting for an extension. The variable is the extension name.">
         extension <ph name="EXTENSION_NAME">$1<ex>Adblock</ex></ph>
       </message>
       <message name="IDS_LOAD_STATE_WAITING_FOR_CACHE">
         Waiting for cache...
@@ skipping 8127 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>