Http Bad: Add "Learn more" sublabel to warning message and make it clickable

components/autofill/core/browser/autofill_client.h

Index: components/autofill/core/browser/autofill_client.h
diff --git a/components/autofill/core/browser/autofill_client.h b/components/autofill/core/browser/autofill_client.h
index 27bfd7b3a9d47f32184d0d94314dc87eca4773d1..474a745e8ea895740a38e1fccf2e1fabd04f7468 100644
--- a/components/autofill/core/browser/autofill_client.h
+++ b/components/autofill/core/browser/autofill_client.h
@@ -189,6 +189,9 @@ class AutofillClient {
   // Starts the signin flow. Should not be called if ShouldShowSigninPromo()
   // returns false.
   virtual void StartSigninFlow() = 0;
+
+  // Shows the explanation of http not secure warning message.
+  virtual void ShowHttpNotSecureExplanation() = 0;
 };
 
 }  // namespace autofill