Removed webControllerDidSuppressDialog: callback.

ios/web/public/test/fakes/test_web_state_observer.mm

Index: ios/web/public/test/fakes/test_web_state_observer.mm
diff --git a/ios/web/public/test/fakes/test_web_state_observer.mm b/ios/web/public/test/fakes/test_web_state_observer.mm
index 67c2992d3407e96e995db78a7cea652a0aa47801..fa9f746ec87cd6f31cc95c0801bc24935039548f 100644
--- a/ios/web/public/test/fakes/test_web_state_observer.mm
+++ b/ios/web/public/test/fakes/test_web_state_observer.mm
@@ -96,6 +96,12 @@ void TestWebStateObserver::DidChangeVisibleSecurityState() {
   did_change_visible_security_state_info_->web_state = web_state();
 }
 
+void TestWebStateObserver::DidSuppressDialog() {
+  did_suppress_dialog_info_ =
+      base::MakeUnique<web::TestDidSuppressDialogInfo>();
+  did_suppress_dialog_info_->web_state = web_state();
+}
+
 void TestWebStateObserver::DocumentSubmitted(const std::string& form_name,
                                              bool user_initiated) {
   submit_document_info_ = base::MakeUnique<web::TestSubmitDocumentInfo>();