Add strings needed for the PIN unlock section in md-settings.

chrome/app/settings_strings.grdp

 <?xml version="1.0" encoding="utf-8"?>
 <!-- Settings-specific strings (included from generated_resources.grd). -->
 <grit-part>
   <!-- About Page -->
   <if expr="chromeos">
     <message name="IDS_SETTINGS_ABOUT_PAGE_CHECK_FOR_UPDATES" desc="The button label to check for updates and apply (download and install) if found">
       Check for updates
     </message>
     <message name="IDS_SETTINGS_ABOUT_PAGE_CURRENT_CHANNEL_STABLE" desc="The stable label in the message about current channel.">
       stable
@@ skipping 1132 matching lines @@
     Manage supervised users
   </message>
   <message name="IDS_SETTINGS_CHANGE_PICTURE_PROFILE_PHOTO" desc="The text on the Google profile photo of the user.">
     Google Profile photo
   </message>
 
   <if expr="chromeos">
     <message name="IDS_SETTINGS_PEOPLE_ENABLE_SCREENLOCK" desc="The text on the checkbox to enable screenlocker for current user.">
       Require password to wake from sleep
     </message>
+    <message name="IDS_SETTINGS_PEOPLE_QUICK_UNLOCK_TITLE" desc="Text on the people page which opens up the quick unlock subpage and the title of the quick unlock subpage.">
+      Configure quick unlock
+    </message>
+    <message name="IDS_SETTINGS_PEOPLE_QUICK_UNLOCK_CONFIRM_LOGIN" desc="Text above a password input field that tells the user they need to submit their password to configure these settings.">
+      Confirm your login to continue
+    </message>
+    <message name="IDS_SETTINGS_PEOPLE_QUICK_UNLOCK_PASSWORD_LABEL" desc="An input box label that tells the user to enter their password in that input box.">
+      Password
+    </message>
+    <message name="IDS_SETTINGS_PEOPLE_QUICK_UNLOCK_INVALID_PASSWORD" desc="Text on a password field that tells the user the password is incorrect.">
+      Not valid
+    </message>
+    <message name="IDS_SETTINGS_PEOPLE_QUICK_UNLOCK_CHOOSE_UNLOCK_METHOD" desc="Text below the page title that tells the user to select a method to unlock the device. This is *only* for unlocking a device; it cannot be used to sign into a device.">
+      Choose the method you would like to use to log back in to your account:
+    </message>
+    <message name="IDS_SETTINGS_PEOPLE_QUICK_UNLOCK_UNLOCK_METHOD_PASSWORD" desc="Only the account password can be used to unlock the device.">
+      Only password
+    </message>
+    <message name="IDS_SETTINGS_PEOPLE_QUICK_UNLOCK_UNLOCK_METHOD_PIN_AND_PASSWORD" desc="The account password or a custom PIN can be used to unlock the device.">
+      PIN or password
+    </message>
+    <message name="IDS_SETTINGS_PEOPLE_QUICK_UNLOCK_UNLOCK_METHOD_NONE" desc="After the device resumes, there will not be a lock screen and no password of any type will be required.">
+      None
+    </message>
+    <message name="IDS_SETTINGS_PEOPLE_QUICK_UNLOCK_CONFIGURE_PIN_BUTTON" desc="Button that is only shown when the user has selected PIN as their unlock method. This button opens up the configuration flow where the user selects the PIN they would like to use.">
+      Configure PIN
+    </message>
+    <message name="IDS_SETTINGS_PEOPLE_QUICK_UNLOCK_CONFIGURE_PIN_CHOOSE_PIN_TITLE" desc="Message shown below the title that tells the user to enter the initial PIN.">
+      Choose your PIN:
+    </message>
+    <message name="IDS_SETTINGS_PEOPLE_QUICK_UNLOCK_CONFIGURE_PIN_CHOOSE_PIN_WEAK_PIN_WARNING" desc="Message shown below the title that warns the user they have entered a PIN that is easy to guess.">
+      This PIN is easy to guess:
+    </message>
+    <message name="IDS_SETTINGS_PEOPLE_QUICK_UNLOCK_CONFIGURE_PIN_CHOOSE_PIN_TOO_SHORT" desc="Message shown below the title that tells the user that the PIN they entered needs to be at least four digits long.">
+      PIN must be at least 4 digits:
+    </message>
+    <message name="IDS_SETTINGS_PEOPLE_QUICK_UNLOCK_CONFIGURE_PIN_CONTINUE_BUTTON" desc="A button that accepts the users initial PIN. The user will have to enter the PIN again after hitting this button to confirm that they entered it correctly.">
+      Continue
+    </message>
+    <message name="IDS_SETTINGS_PEOPLE_QUICK_UNLOCK_CONFIGURE_PIN_CONFIRM_PIN_TITLE" desc="Message shown below the title that tells the user to confirm their initial PIN entry.">
+      Confirm your PIN:
+    </message>
+    <message name="IDS_SETTINGS_PEOPLE_QUICK_UNLOCK_CONFIGURE_PIN_MISMATCHED_PINS" desc="Message shown below the title that tells the user they have entered two different PIN values.">
+      PIN's don't match:
+    </message>
+    <message name="IDS_SETTINGS_PEOPLE_QUICK_UNLOCK_CONFIGURE_PIN_BACK_BUTTON" desc="Button that goes from the confirm PIN screen to the initial PIN setup screen.">
+      Back
+    </message>
     <message name="IDS_SETTINGS_CHANGE_PICTURE_DIALOG_TITLE" desc="Title of the subpage shown when user wants to change his/her picture.">
       Change picture
     </message>
     <message name="IDS_SETTINGS_CHANGE_PICTURE_DIALOG_TEXT" desc="Text with description of what to do on Change picture subpage.">
       Choose a picture to display for your account on the sign-in screen.
     </message>
     <message name="IDS_SETTINGS_CHANGE_PICTURE_CHOOSE_FILE" desc="Text on a button that shows file dialog to choose a picture from file.">
       Choose a file
     </message>
     <message name="IDS_SETTINGS_CHANGE_PICTURE_TAKE_PHOTO" desc="The text on the button to take photo of the current user.">
@@ skipping 398 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>