[Password Manager] Presave the form with generated password till successful login

components/autofill/content/common/autofill_messages.h

 // Copyright 2013 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.
 
 // Multiply-included message file, hence no include guard.
 
 #include <string>
 #include <vector>
 
 #include "base/strings/string16.h"
@@ skipping 323 matching lines @@
 // Instructs the browser to show the popup for editing a generated password.
 // The location should be specified in the renderers coordinate system. Form
 // is the form associated with the password field.
 IPC_MESSAGE_ROUTED2(AutofillHostMsg_ShowPasswordEditingPopup,
                     gfx::RectF /* source location */,
                     autofill::PasswordForm)
 
 // Instructs the browser to hide any password generation popups.
 IPC_MESSAGE_ROUTED0(AutofillHostMsg_HidePasswordGenerationPopup)
 
-// Instructs the browsr that form no longer contains a generated password.
+// Instructs the browser to presave the form with generated password.
+IPC_MESSAGE_ROUTED1(AutofillHostMsg_PresaveGeneratedPassword,

[dvadym, 2016/04/06 12:44:23]

Why do we need 2 messages? It seems that 1 is enough, anyway in
PasswordFormManager::UpdatePresavedPassword we save if presaved_form is absent.

[kolos1, 2016/04/07 13:05:18]

Done.

+                    autofill::PasswordForm)
+
+// Instructs the browser to update the presaved form with generated password.
+IPC_MESSAGE_ROUTED1(AutofillHostMsg_UpdatePresavedPassword,
+                    autofill::PasswordForm)
+
+// Instructs the browser that form no longer contains a generated password and
+// the presaved form should be removed.
 IPC_MESSAGE_ROUTED1(AutofillHostMsg_PasswordNoLongerGenerated,
                     autofill::PasswordForm)
 
 // Instruct the browser to show a popup with suggestions filled from data
 // associated with |key|. The popup will use |text_direction| for displaying
 // text.
 IPC_MESSAGE_ROUTED5(
     AutofillHostMsg_ShowPasswordSuggestions,
     int /* key */,
     base::i18n::TextDirection /* text_direction */,
     base::string16 /* username typed by user */,
     int /* options bitmask of autofill::ShowPasswordSuggestionsOptions */,
     gfx::RectF /* input field bounds, window-relative */)
 
 // Inform browser of data list values for the curent field.
 IPC_MESSAGE_ROUTED2(AutofillHostMsg_SetDataList,
                     std::vector<base::string16> /* values */,
                     std::vector<base::string16> /* labels */)
 
 // Inform the browser which password form is currently focused, as a response
 // to the |AutofillMsg_FindFocusedPasswordForm| request. If no password form
 // is focused, the response will contain an empty |autofill::PasswordForm|.
 IPC_MESSAGE_ROUTED1(AutofillHostMsg_FocusedPasswordFormFound,
                     autofill::PasswordForm)