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

public/web/WebFormControlElement.h

 /*
  * Copyright (C) 2010 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 92 matching lines @@
     // Returns true if sumit is activated.
     BLINK_EXPORT bool isActivatedSubmit() const;
 
     // Returns the name that should be used for the specified |element| when
     // storing autofill data.  This is either the field name or its id, an empty
     // string if it has no name and no id.
     BLINK_EXPORT WebString nameForAutofill() const;
 
     BLINK_EXPORT WebFormElement form() const;
 
+    // Sets the text selection start offset for the suggested value for element.
+    BLINK_EXPORT void setSuggestedValueStart(int);
+
+    // Returns the text selection start offset for the suggested value for element.
+    BLINK_EXPORT int suggestedValueStart() const;
+
 #if BLINK_IMPLEMENTATION
     WebFormControlElement(const PassRefPtrWillBeRawPtr<HTMLFormControlElement>&);
     WebFormControlElement& operator=(const PassRefPtrWillBeRawPtr<HTMLFormControlElement>&);
     operator PassRefPtrWillBeRawPtr<HTMLFormControlElement>() const;
 #endif
 };
 
 } // namespace blink
 
 #endif