Incognito NTP style tweaks

BUG=512984

Review URL: https://codereview.chromium.org/1516233003

Cr-Commit-Position: refs/heads/master@{#369736}
diff --git a/chrome/app/generated_resources.grd b/chrome/app/generated_resources.grd
index bebce6e..eb2a637 100644
--- a/chrome/app/generated_resources.grd
+++ b/chrome/app/generated_resources.grd
@@ -10433,8 +10433,8 @@
           Learn more
         </message>
         <message name="IDS_NEW_TAB_OTR_MESSAGE_WARNING"
-                 desc="OTR window warning message">
-          Going incognito doesn’t hide your browsing from your employer, your internet service provider, or the websites you visit.
+                 desc="OTR window warning message. This follows the IDS_NEW_TAB_OTR_DESCRIPTION paragraph">
+          However, you aren’t invisible. Going incognito doesn’t hide your browsing from your employer, your internet service provider, or the websites you visit.
         </message>
         <message name="IDS_NEW_TAB_GUEST_SESSION_HEADING"
               desc="Heading used when a person enters Guest Session">