Add custom interstitial for captive portals.

chrome/app/generated_resources.grd

Index: chrome/app/generated_resources.grd
diff --git a/chrome/app/generated_resources.grd b/chrome/app/generated_resources.grd
index 8df784f2b0e1875a42d6e6c91fa8e43da6e53694..8a16d2060b9bf82c0fc164ee95cb040fbecb3974 100644
--- a/chrome/app/generated_resources.grd
+++ b/chrome/app/generated_resources.grd
@@ -9331,6 +9331,32 @@ and incorrect credentials. Either an attacker is trying to pretend to be <ph nam
         Public key hashes: <ph name="HASHES">$1<ex>9FEE18CC4302340DDE234345345345</ex></ph>
       </message>
 
+      <!-- Captive portal interstitial -->
+      <message name="IDS_CAPTIVE_PORTAL_TITLE" desc="Title in the error page when a secure request is blocked because a captive portal is manipulating the connection (i.e. a Wi-fi hotspot is redirecting the request to another page until the user logs in)">
+        <ph name="URL">$1<ex>http://www.google.com/foo/bar</ex></ph> is not secure
+      </message>
+      <message name="IDS_CAPTIVE_PORTAL_HEADING" desc="Heading in the error page when a secure request is blocked because a captive portal is manipulating the connection (i.e. a Wi-fi hotspot is redirecting the request to another page until the user logs in)">
+        The Wi-fi hotspot you are connected to is manipulating this secure connection. Try logging in.
+      </message>
+      <message name="IDS_CAPTIVE_PORTAL_PRIMARY_PARAGRAPH" desc="The primary explanatory paragraph for the captive portal interstitial.">
+        If you are in a public place such as a coffee shop, hotel or airport, a Wi-Fi hotspot you are connected to may be manipulating your internet connection until you log in to the hotspot.
+      </message>
+      <message name="IDS_CAPTIVE_PORTAL_DETAILS" desc="Explanatory paragraph for the captive portal interstitial.">
+        Chrome attempted to connect with <ph name="BEGIN_BOLD">&lt;strong&gt;</ph><ph name="SITE">$1<ex>google.com</ex></ph><ph name="END_BOLD">&lt;/strong&gt;</ph> but instead reached <ph name="BEGIN_BOLD">&lt;strong&gt;</ph><ph name="SITE">$2<ex>captive-portal.com</ex></ph><ph name="END_BOLD">&lt;/strong&gt;</ph>. This could be caused by a wifi hotspot redirecting your connection or worse, an attacker trying to send you to a harmful site.
+        &lt;br&gt;&lt;br&gt;
+        <ph name="BEGIN_BOLD">&lt;strong&gt;</ph>If you still see this error after logging in to the hotspot, do not continue!<ph name="END_BOLD">&lt;/strong&gt;</ph>
+      </message>
+      <message name="IDS_CAPTIVE_PORTAL_BUTTON_OPEN_LOGIN_PAGE" desc="Text for the open login page button">
+        Open login page
+      </message>
+      <message name="IDS_CAPTIVE_PORTAL_BUTTON_MORE" desc="Text for open details button">
+        More
+      </message>
+      <message name="IDS_CAPTIVE_PORTAL_BUTTON_LESS" desc="Text for close details button">
+        Less
+      </message>
+
+
       <!-- Misc strings for SSL UI -->
       <message name="IDS_UNSAFE_FRAME_MESSAGE" desc="The text displayed in the content that is subsituted to an unsafe frame.">
         This frame was blocked because it contains some insecure content.