Implement the password edit UI.

chrome/app/settings_strings.grdp

 <?xml version="1.0" encoding="utf-8"?>
 <!-- Settings-specific strings (included from generated_resources.grd). -->
 <grit-part>
   <!-- Policy Indicators -->
   <message name="IDS_SETTINGS_CONTROLLED_SETTING_EXTENSION" desc="Text displayed in the controlled settings indicator tooltip when a setting's value is enforced by an extension.">
     This setting is controlled by extension <ph name="NAME">$1<ex>Settings Extension</ex></ph>
   </message>
 
   <!-- Accessibility Page -->
   <message name="IDS_SETTINGS_ACCESSIBILITY" desc="Name of the settings page which displays accessibility preferences.">
@@ skipping 142 matching lines @@
   </message>
   <message name="IDS_SETTINGS_PASSWORDS_MENU" desc="Label for a button shows options available for this password item. Available options should be 'Edit' and 'Remove'">
    Menu
   </message>
   <message name="IDS_SETTINGS_PASSWORDS_EDIT" desc="Label for a menu item that shows a dialog with edit options for a password.">
    Edit
   </message>
   <message name="IDS_SETTINGS_PASSWORDS_REMOVE" desc="Label for a menu item that removes a saved password.">
    Remove
   </message>
+  <message name="IDS_SETTINGS_PASSWORDS_EDIT_TITLE" desc="Title for the 'Edit saved password' dialog. This dialog lets a user see a saved password and copy the username.">
+    Edit saved password
+  </message>
+  <message name="IDS_SETTINGS_PASSWORDS_WEBSITE" desc="Label for the website a password is for when editing a password.">
+    Website
+  </message>
+  <message name="IDS_SETTINGS_PASSWORDS_USERNAME" desc="Label for the saved username when editing a password.">
+    Username
+  </message>
+  <message name="IDS_SETTINGS_PASSWORDS_PASSWORD" desc="Label for the saved password when editing a password.">
+    Password
+  </message>
 
   <!-- Default Browser Page -->
   <if expr="not chromeos">
     <message name="IDS_SETTINGS_DEFAULT_BROWSER" desc="Name of the Default Browser page, which allows users to set which browser will open .html files within the OS.">
       Default browser
     </message>
   </if>
 
   <!-- Bluetooth Page -->
   <if expr="chromeos">
@@ skipping 979 matching lines @@
       System
     </message>
     <message name="IDS_SETTINGS_SYSTEM_HARDWARE_ACCELERATION_LABEL" desc="Label for the checkbox that forces Chrome to render via hardware acceleration (GPU) when available.">
       Use hardware acceleration when available
     </message>
     <message name="IDS_SETTINGS_SYSTEM_PROXY_SETTINGS_BUTTON" desc="Text for the button that changes a user's network proxy settings.">
       Change proxy settings
     </message>
   </if>
 </grit-part>