[Password Manager] Show omnibox icon and anchored prompt once user start typing password

chrome/browser/ui/passwords/passwords_client_ui_delegate.h

 // Copyright 2015 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.
 
 #ifndef CHROME_BROWSER_UI_PASSWORDS_PASSWORDS_CLIENT_UI_DELEGATE_H_
 #define CHROME_BROWSER_UI_PASSWORDS_PASSWORDS_CLIENT_UI_DELEGATE_H_
 
 #include <map>
 #include <memory>
 #include <vector>
@@ skipping 20 matching lines @@
   // about whether they would like to save the password.
   virtual void OnPasswordSubmitted(
       std::unique_ptr<password_manager::PasswordFormManager> form_manager) = 0;
 
   // Called when the user submits a new password for an existing credential.
   // This stores the provided object and triggers the UI to prompt the user
   // about whether they would like to update the password.
   virtual void OnUpdatePasswordSubmitted(
       std::unique_ptr<password_manager::PasswordFormManager> form_manager) = 0;
 
+  // Called when the user starts typing in a password field. This switches the
+  // icon to a pending state, a user can click on the icon and open a
+  // save/update bubble.
+  virtual void OnShowManualFallbackForSaving(
+      std::unique_ptr<password_manager::PasswordFormManager> form_manager,
+      bool is_update) = 0;
+
+  // Called when the user cleared the password field. This switches the icon
+  // back to manage or inactive state.
+  virtual void OnHideManualFallbackForSaving() = 0;
+
   // Called when the site asks user to choose from credentials. This triggers
   // the UI to prompt the user. |local_credentials| shouldn't be empty. |origin|
   // is a URL of the site that requested a credential.
   // Returns true when the UI is shown. |callback| is called when the user made
   // a decision. If the UI isn't shown the method returns false and doesn't call
   // |callback|.
   virtual bool OnChooseCredentials(
       std::vector<std::unique_ptr<autofill::PasswordForm>> local_credentials,
       const GURL& origin,
       const base::Callback<void(const autofill::PasswordForm*)>& callback) = 0;
@@ skipping 25 matching lines @@
 
  protected:
   virtual ~PasswordsClientUIDelegate() = default;
 };
 
 // Returns ManagePasswordsUIController instance for |contents|
 PasswordsClientUIDelegate* PasswordsClientUIDelegateFromWebContents(
     content::WebContents* web_contents);
 
 #endif  // CHROME_BROWSER_UI_PASSWORDS_PASSWORDS_CLIENT_UI_DELEGATE_H_