Add "previewing on hover" support for password field.

components/autofill/content/renderer/autofill_agent.h

 // Copyright 2013 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 COMPONENTS_AUTOFILL_CONTENT_RENDERER_AUTOFILL_AGENT_H_
 #define COMPONENTS_AUTOFILL_CONTENT_RENDERER_AUTOFILL_AGENT_H_
 
 #include <vector>
 
 #include "base/basictypes.h"
@@ skipping 83 matching lines @@
   void OnFillForm(int query_id, const FormData& form);
   void OnPreviewForm(int query_id, const FormData& form);
 
   // For external Autofill selection.
   void OnClearForm();
   void OnClearPreviewedForm();
   void OnFillFieldWithValue(const base::string16& value);
   void OnPreviewFieldWithValue(const base::string16& value);
   void OnAcceptDataListSuggestion(const base::string16& value);
   void OnAcceptPasswordAutofillSuggestion(const base::string16& username);
+  void OnPreviewPassword(const base::string16& username);
 
   // Called when interactive autocomplete finishes.
   void OnRequestAutocompleteResult(
       blink::WebFormElement::AutocompleteResult result,
       const FormData& form_data);
 
   // Called when an autocomplete request succeeds or fails with the |result|.
   void FinishAutocompleteRequest(
       blink::WebFormElement::AutocompleteResult result);
 
@@ skipping 120 matching lines @@
                            NoCancelOnSubframeNavigateAfterDone);
   FRIEND_TEST_ALL_PREFIXES(RequestAutocompleteRendererTest,
                            InvokingTwiceOnlyShowsOnce);
 
   DISALLOW_COPY_AND_ASSIGN(AutofillAgent);
 };
 
 }  // namespace autofill
 
 #endif  // COMPONENTS_AUTOFILL_CONTENT_RENDERER_AUTOFILL_AGENT_H_