Add "previewing on hover" support for password field.

components/autofill/content/renderer/password_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_PASSWORD_AUTOFILL_AGENT_H_
 #define COMPONENTS_AUTOFILL_CONTENT_RENDERER_PASSWORD_AUTOFILL_AGENT_H_
 
 #include <map>
 #include <vector>
 
@@ skipping 20 matching lines @@
   virtual ~PasswordAutofillAgent();
 
   // WebViewClient editor related calls forwarded by the RenderView.
   // If they return true, it indicates the event was consumed and should not
   // be used for any other autofill activity.
   bool TextFieldDidEndEditing(const blink::WebInputElement& element);
   bool TextDidChangeInTextField(const blink::WebInputElement& element);
   bool TextFieldHandlingKeyDown(const blink::WebInputElement& element,
                                 const blink::WebKeyboardEvent& event);
 
+  // Preview the password associated with user name |username|. Returns true if
+  // the username and password fields were previewed, false otherwise.
+  bool DidSelectAutofillSuggestion(const blink::WebNode& node,
+                                   const blink::WebString& username);
+
   // Fills the password associated with user name |username|. Returns true if
   // the username and password fields were filled, false otherwise.
   bool DidAcceptAutofillSuggestion(const blink::WebNode& node,
                                    const blink::WebString& username);
   // A no-op.  Password forms are not previewed, so they do not need to be
   // cleared when the selection changes.  However, this method returns
   // true when |node| is fillable by password Autofill.
   bool DidClearAutofillSelection(const blink::WebNode& node);
   // Shows an Autofill popup with username suggestions for |element|.
   // Returns true if any suggestions were shown, false otherwise.
   bool ShowSuggestions(const blink::WebInputElement& element);
+  // Return true if password was autofilled before preview the form.

[Ilya Sherman, 2014/03/21 22:35:19]

nit: "before preview" -> "before previewing"

[ziran.sun, 2014/03/25 18:25:26]

Done.

+  bool WasPasswordAutofilled();
 
   // Called when new form controls are inserted.
   void OnDynamicFormsSeen(blink::WebFrame* frame);
 
  protected:
   virtual bool OriginCanAccessPasswordManager(
       const blink::WebSecurityOrigin& origin);
 
  private:
   friend class PasswordAutofillAgentTest;
@@ skipping 77 matching lines @@
 
   // Attempts to fill |username_element| and |password_element| with the
   // |fill_data|.  Will use the data corresponding to the preferred username,
   // unless the |username_element| already has a value set.  In that case,
   // attempts to fill the password matching the already filled username, if
   // such a password exists.
   void FillFormOnPasswordRecieved(const PasswordFormFillData& fill_data,
                                   blink::WebInputElement username_element,
                                   blink::WebInputElement password_element);
 
+  std::vector<base::string16> FindUserNameAndPassword(
+      base::string16 current_username,
+      const PasswordFormFillData& fill_data,
+      bool exact_username_match);
+
   bool FillUserNameAndPassword(
       blink::WebInputElement* username_element,
       blink::WebInputElement* password_element,
       const PasswordFormFillData& fill_data,
       bool exact_username_match,
       bool set_selection);
 
+  bool PreviewUserNameAndPassword(
+      blink::WebInputElement* username_element,
+      blink::WebInputElement* password_element,
+      const PasswordFormFillData& fill_data,
+      bool exact_username_match,
+      bool set_selection);
+
   // Fills |login_input| and |password| with the most relevant suggestion from
   // |fill_data| and shows a popup with other suggestions.
   void PerformInlineAutocomplete(
       const blink::WebInputElement& username,
       const blink::WebInputElement& password,
       const PasswordFormFillData& fill_data);
 
   // Invoked when the passed frame is closing.  Gives us a chance to clear any
   // reference we may have to elements in that frame.
   void FrameClosing(const blink::WebFrame* frame);
@@ skipping 16 matching lines @@
 
   // Pointer to the WebView. Used to access page scale factor.
   blink::WebView* web_view_;
 
   // Set if the user might be submitting a password form on the current page,
   // but the submit may still fail (i.e. doesn't pass JavaScript validation).
   FrameToPasswordFormMap provisionally_saved_forms_;
 
   PasswordValueGatekeeper gatekeeper_;
 
+  bool was_password_autofilled_;
+
   base::WeakPtrFactory<PasswordAutofillAgent> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(PasswordAutofillAgent);
 };
 
 }  // namespace autofill
 
 #endif  // COMPONENTS_AUTOFILL_CONTENT_RENDERER_PASSWORD_AUTOFILL_AGENT_H_