Password manager on iOS should understand non-HTML landing pages

ios/chrome/browser/passwords/password_controller.mm

 // Copyright 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #import "ios/chrome/browser/passwords/password_controller.h"
 
 #include <stddef.h>
 
 #include <algorithm>
 #include <utility>
@@ skipping 321 matching lines @@
 - (void)webStateDidLoadPage:(web::WebState*)webState {
   // Clear per-page state.
   formData_.reset();
 
   // Retrieve the identity of the page. In case the page might be malicous,
   // returns early.
   GURL pageURL;
   if (!GetPageURLAndCheckTrustLevel(webState, &pageURL))
     return;
 
-  if (!web::UrlHasWebScheme(pageURL) || !webState->ContentIsHTML())
+  if (!web::UrlHasWebScheme(pageURL))
     return;
 
   // Notify the password manager that the page loaded so it can clear its own
   // per-page state.
   passwordManager_->DidNavigateMainFrame();
 
+  if (!webState->ContentIsHTML()) {
+    // If the current page is not HTML, it does not contain any HTML forms.
+    [self
+        didFinishPasswordFormExtraction:std::vector<autofill::PasswordForm>()];
+  }
+
   // Read all password forms from the page and send them to the password
   // manager.
   base::WeakNSObject<PasswordController> weakSelf(self);
   [self findPasswordFormsWithCompletionHandler:^(
             const std::vector<autofill::PasswordForm>& forms) {
     [weakSelf didFinishPasswordFormExtraction:forms];
   }];
 }
 
 - (void)webState:(web::WebState*)webState
@@ skipping 431 matching lines @@
 
 - (PasswordManager*)passwordManager {
   return passwordManager_.get();
 }
 
 - (JsPasswordManager*)passwordJsManager {
   return passwordJsManager_;
 }
 
 @end