Simplify the text in the external protocol confirmation dialog.

chrome/app/google_chrome_strings.grd

 <?xml version="1.0" encoding="UTF-8"?>
 <!-- This file contains definitions of strings that are specific to
 Google Chrome. These strings will be translated for each locale that Google
 Chrome supports. If you update this file, be sure also to update
 chromium_strings.grd. -->
 
 <grit base_dir="." latest_public_release="0" current_release="1"
       output_all_resource_defines="false" source_lang_id="en" enc_check="möl">
   <outputs>
     <output filename="grit/google_chrome_strings.h" type="rc_header">
@@ skipping 302 matching lines @@
                  desc="Title for the hard-coded thumbnail that represents the Google Chrome Welcome page.  This is used on the NTP when there aren't enough thumbnails to show. [Length: 14em]">
           Welcome
         </message>
       </if>
       <if expr="not chromeos and not is_ios">
         <message name="IDS_NEW_TAB_CHROME_WELCOME_PAGE_TITLE"
                  desc="Title for the hard-coded thumbnail that represents the Google Chrome OS Welcome page. This is used on the NTP when there aren't enough thumbnails to show.">
           Welcome to Google Chrome
         </message>
       </if>
-      <if expr="not chromeos">
-        <message name="IDS_EXTERNAL_PROTOCOL_INFORMATION" desc="General information about what Chrome is trying to do when opening this external protocol">
-          Google Chrome needs to launch an external application to handle <ph name="SCHEME">$1<ex>acrobat:</ex></ph> links. The link requested is <ph name="PROTOLINK">$2<ex>acrobat:yourpdf</ex></ph>.
-        </message>
-      </if>
       <if expr="chromeos">
-        <message name="IDS_EXTERNAL_PROTOCOL_INFORMATION" desc="General information about what Chrome is trying to do when opening this external protocol">
-          Google Chrome OS does not support launching an external application to handle <ph name="SCHEME">$1<ex>acrobat:</ex></ph> links. The link requested is <ph name="PROTOLINK">$2<ex>acrobat:yourpdf</ex></ph>.
+        <message name="IDS_EXTERNAL_PROTOCOL_TITLE" desc="External Protocol Dialog Title">
+          Google Chrome OS cannot open this page.
         </message>
       </if>
       <!-- Strings used to warn that an OS is not supported -->
       <if expr="is_win">
         <message name="IDS_UNSUPPORTED_OS_PRE_WIN_XP" desc="The text used to warn the user that Windows pre-XP is not supported">
           Google Chrome requires Windows XP or later. Some features may not work.
         </message>
       </if>
       <if expr="not chromeos">
         <message name="IDS_OPTIONS_RELAUNCH_REQUIRED" desc="The message displayed for an option that requires a relaunch to take effect. This appears in a message box if an option is changed that requires a relaunch.">
@@ skipping 929 matching lines @@
         <message name="IDS_WELCOME_HEADER" desc="A message which will appear as the header on the Welcome UI if the user has never run Chrome before.">
           Welcome to Chrome
         </message>
         <message name="IDS_WELCOME_HEADER_AFTER_FIRST_RUN" desc="A message which will appear as the header on the Welcome UI if the user has run Chrome before.">
           Take Chrome everywhere
         </message>
       </if>
     </messages>
   </release>
 </grit>