Don't show "Save password" prompt for a failed login

components/password_manager/core/browser/password_manager.h

Index: components/password_manager/core/browser/password_manager.h
diff --git a/components/password_manager/core/browser/password_manager.h b/components/password_manager/core/browser/password_manager.h
index adafb2d838f94f629382c9a8ea3cd8c5f4cdfb11..a2c2f16557a3796a75e4997d96345293e274173a 100644
--- a/components/password_manager/core/browser/password_manager.h
+++ b/components/password_manager/core/browser/password_manager.h
@@ -95,7 +95,8 @@ class PasswordManager : public LoginModel {
 
   // Handles password forms being rendered.
   void OnPasswordFormsRendered(
-      const std::vector<autofill::PasswordForm>& visible_forms);
+      const std::vector<autofill::PasswordForm>& visible_forms,
+      bool did_stop_loading);
 
   // Handles a password form being submitted.
   virtual void OnPasswordFormSubmitted(
@@ -183,6 +184,12 @@ class PasswordManager : public LoginModel {
   // Callbacks to be notified when a password form has been submitted.
   std::vector<PasswordSubmittedCallback> submission_callbacks_;
 
+  // Records all visible forms seen during a page load, in all frames of the
+  // page. When the page stops loading, the password manager checks if one of
+  // the recorded forms matches the login form from the previous page
+  // (to see if the login was a failure), and clears the vector.
+  std::vector<autofill::PasswordForm> all_visible_forms_;
+
   DISALLOW_COPY_AND_ASSIGN(PasswordManager);
 };