iOS: Mark HTTP pages with credit card fields with an omnibox icon.

ios/web/public/web_state/web_state.h

Index: ios/web/public/web_state/web_state.h
diff --git a/ios/web/public/web_state/web_state.h b/ios/web/public/web_state/web_state.h
index 75f6e79774bd69fbf482fe967ef4ddb5c2fc80d5..57a156d72c6d4becf1afcdc0799daa4ea8b09d9b 100644
--- a/ios/web/public/web_state/web_state.h
+++ b/ios/web/public/web_state/web_state.h
@@ -213,6 +213,10 @@ class WebState : public base::SupportsUserData {
   // containing a password field.
   virtual void OnPasswordInputShownOnHttp() = 0;
 
+  // Tells the WebState that the current page is an HTTP page

[Eugene But (OOO till 7-30), 2017/02/03 19:24:16]

Do you want to use comment from web contents which looks more informative?
https://cs.chromium.org/chromium/src/content/public/browser/web_contents.h?ty...

If so, could you please update OnPasswordInputShownOnHttp comment as well.

[lgarron, 2017/02/04 00:28:35]

I'd rather be a little more general here, in case the functionality needs to
change a little bit. Is that okay?

[Eugene But (OOO till 7-30), 2017/02/04 01:29:17]

It's ok, but how is this code different from content? If this comment is better
then maybe comments in content should be updated? Generally this is up to you.

+  // containing a credit card field.
+  virtual void OnCreditCardInputShownOnHttp() = 0;
+
   // Callback used to handle script commands.
   // The callback must return true if the command was handled, and false
   // otherwise.