PlzNavigate: send searchable form data to the browser side on form submission.

third_party/WebKit/Source/core/loader/EmptyClients.h

 /*
  * Copyright (C) 2006 Eric Seidel (eric@webkit.org)
  * Copyright (C) 2008, 2009, 2010, 2011, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
  * Copyright (C) 2012 Samsung Electronics. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
@@ skipping 256 matching lines @@
   void dispatchDidFailLoad(const ResourceError&, HistoryCommitType) override {}
   void dispatchDidFinishDocumentLoad() override {}
   void dispatchDidFinishLoad() override {}
   void dispatchDidChangeThemeColor() override {}
 
   NavigationPolicy decidePolicyForNavigation(const ResourceRequest&,
                                              DocumentLoader*,
                                              NavigationType,
                                              NavigationPolicy,
                                              bool,
-                                             bool) override;
+                                             bool,
+                                             HTMLFormElement*) override;
 
   void dispatchWillSendSubmitEvent(HTMLFormElement*) override;
   void dispatchWillSubmitForm(HTMLFormElement*) override;
 
   void didStartLoading(LoadStartType) override {}
   void progressEstimateChanged(double) override {}
   void didStopLoading() override {}
 
   void loadURLExternally(const ResourceRequest&,
                          NavigationPolicy,
@@ skipping 137 matching lines @@
   ~EmptyContextMenuClient() override {}
   bool showContextMenu(const ContextMenu*, bool) override { return false; }
   void clearContextMenu() override {}
 };
 
 CORE_EXPORT void fillWithEmptyClients(Page::PageClients&);
 
 }  // namespace blink
 
 #endif  // EmptyClients_h