Add support for autofilling radio buttons and checkboxes.

chrome/renderer/autofill/form_cache.h

 // Copyright (c) 2011 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_RENDERER_AUTOFILL_FORM_CACHE_H_
 #define CHROME_RENDERER_AUTOFILL_FORM_CACHE_H_
 
 #include <map>
 #include <set>
 #include <vector>
@@ skipping 36 matching lines @@
   // and the experiment id for the server predictions.
   bool ShowPredictions(const FormDataPredictions& form);
 
  private:
   // The cached web frames.
   std::set<WebKit::WebDocument> web_documents_;
 
   // The cached initial values for <select> elements.
   std::map<const WebKit::WebSelectElement, string16> initial_select_values_;
 
+  // The cached initial values for checkable <input> elements.
+  std::map<const WebKit::WebInputElement, bool> initial_checked_state_;
+
   DISALLOW_COPY_AND_ASSIGN(FormCache);
 };
 
 }  // namespace autofill
 
 #endif  // CHROME_RENDERER_AUTOFILL_FORM_CACHE_H_