[Autofill/Autocomplete Feature] Substring matching instead of prefix matching.

components/password_manager/content/browser/content_password_manager_driver.cc

 // Copyright 2014 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.
 
 #include "components/password_manager/content/browser/content_password_manager_driver.h"
 
 #include "components/autofill/content/common/autofill_messages.h"
 #include "components/autofill/core/common/form_data.h"
 #include "components/autofill/core/common/password_form.h"
 #include "components/password_manager/content/browser/content_password_manager_driver_factory.h"
@@ skipping 77 matching lines @@
 void ContentPasswordManagerDriver::FillSuggestion(
     const base::string16& username,
     const base::string16& password) {
   content::RenderFrameHost* host = render_frame_host_;
   host->Send(new AutofillMsg_FillPasswordSuggestion(host->GetRoutingID(),
                                                     username, password));
 }
 
 void ContentPasswordManagerDriver::PreviewSuggestion(
     const base::string16& username,
-    const base::string16& password) {
+    const base::string16& password,
+    size_t match_start) {
   content::RenderFrameHost* host = render_frame_host_;
-  host->Send(new AutofillMsg_PreviewPasswordSuggestion(host->GetRoutingID(),
-                                                       username, password));
+  host->Send(new AutofillMsg_PreviewPasswordSuggestion(
+      host->GetRoutingID(), username, password, match_start));
 }
 
 void ContentPasswordManagerDriver::ClearPreviewedForm() {
   content::RenderFrameHost* host = render_frame_host_;
   host->Send(new AutofillMsg_ClearPreviewedForm(host->GetRoutingID()));
 }
 
 void ContentPasswordManagerDriver::ForceSavePassword() {
   content::RenderFrameHost* host = render_frame_host_;
   host->Send(new AutofillMsg_FindFocusedPasswordForm(host->GetRoutingID()));
@@ skipping 74 matching lines @@
   GetPasswordManager()->OnInPageNavigation(this, password_form);
 }
 
 void ContentPasswordManagerDriver::OnPasswordNoLongerGenerated(
     const autofill::PasswordForm& password_form) {
   GetPasswordManager()->SetHasGeneratedPasswordForForm(this, password_form,
                                                        false);
 }
 
 }  // namespace password_manager