Simplify the text in the external protocol confirmation dialog.

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 6e4594875577171c1b3c13835760dbcc551d963e..745d072bdfdb47c8f156e2f43a2c9d0273b17887 100644
--- a/chrome/app/chromium_strings.grd
+++ b/chrome/app/chromium_strings.grd
@@ -319,14 +319,9 @@ If you update this file, be sure also to update google_chrome_strings.grd. -->
           Welcome to Chromium
         </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">
-          Chromium 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">
-          Chromium 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">
+          Chromium OS cannot open this page.
         </message>
       </if>
       <!-- Strings used to warn that an OS is not supported -->