Add autofill dropdown support for password forms.

webkit/glue/password_autocomplete_listener.h

Index: webkit/glue/password_autocomplete_listener.h
===================================================================
--- webkit/glue/password_autocomplete_listener.h	(revision 19957)
+++ webkit/glue/password_autocomplete_listener.h	(working copy)
@@ -32,6 +32,9 @@
   virtual void SetValue(const std::wstring& value);
   virtual void SetSelectionRange(size_t start, size_t end);
   virtual void OnFinishedAutocompleting();
+  virtual void RefreshAutofillPopup(
+      const std::vector<std::wstring>& suggestions,
+      int default_suggestion_index);
 
  private:
   // The underlying DOM element we're wrapping. We reference the underlying
@@ -54,7 +57,9 @@
   virtual void OnBlur(WebCore::HTMLInputElement* element,
                       const std::wstring& user_input);
   virtual void OnInlineAutocompleteNeeded(WebCore::HTMLInputElement* element,
-                                          const std::wstring& user_input);
+                                          const std::wstring& user_input,
+                                          bool backspace_or_delete,
+                                          bool with_suggestion_popup);
 
  private:
   // Check if the input string resembles a potential matching login
@@ -64,6 +69,10 @@
                   const std::wstring& username,
                   const std::wstring& password);
 
+  // Scan |data_| for prefix matches of |input| and add each to |suggestions|.
+  void GetSuggestions(const std::wstring& input,
+                      std::vector<std::wstring>* suggestions);
+
   // Access to password field to autocomplete on blur/username updates.
   scoped_ptr<HTMLInputDelegate> password_delegate_;
   scoped_ptr<HTMLInputDelegate> username_delegate_;