[MD settings] download mocks changes; added disable option for google drive

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>
 
   <if expr="chromeos">
     <!-- Accessibility Page -->
@@ skipping 261 matching lines @@
   </message>
   <message name="IDS_SETTINGS_CLEAR_DATA_CLEARS_SYNCED_DATA" desc="Information that data which is synced across user's devices will be deleted from all those devices.">
     This clears synced data from all devices.
   </message>
 
   <!-- Downloads Page -->
   <message name="IDS_SETTINGS_DOWNLOADS" desc="Name of the settings page which displays download preferences.">
     Downloads
   </message>
   <message name="IDS_SETTINGS_DOWNLOAD_LOCATION" desc="Label for the input which allows the user to specify the default download directory.">
-    Download location:
+    Location
   </message>
   <message name="IDS_SETTINGS_CHANGE_DOWNLOAD_LOCATION" desc="Text for the button which allows the user to change the default download directory.">
     Change
   </message>
   <message name="IDS_SETTINGS_PROMPT_FOR_DOWNLOAD" desc="Label for the checkbox which enables a prompt for the user to choose a download location for each download instead of using the default.">
     Ask where to save each file before downloading
   </message>
+  <message name="IDS_SETTINGS_DISCONNECT_GOOGLE_DRIVE" desc="Label for the checkbox which enables disconnecting from Google Drive account.">
+    Disconnect Google Drive account
+  </message>
 
   <!-- Date/time Page -->
   <message name="IDS_SETTINGS_DATE_TIME" desc="Name of the settings page which displays date and time preferences.">
     Date &amp; Time
   </message>
   <message name="IDS_SETTINGS_TIME_ZONE" desc="Label for the picker which allows users to choose their time zone.">
     Time zone:
   </message>
   <message name="IDS_SETTINGS_USE_24_HOUR_CLOCK" desc="Label for the checkbox which enables a 24-hour clock (as opposed to a 12-hour clock).">
     Use 24-hour clock
@@ skipping 541 matching lines @@
   <message name="IDS_SETTINGS_LOREM_IPSUM" desc="Gibberish example text in settings.">
     Lorem ipsum dolor sit amet, consectetur adipiscing elit.
   </message>
   <message name="IDS_SETTINGS_LOADING" desc="Placeholder text while waiting for font settings to appear, shown only until font settings have loaded.">
     Loading...
   </message>
   <message name="IDS_SETTINGS_ADVANCED_FONT_SETTINGS" desc="Label for advanced font settings.">
     Advanced font settings
   </message>
 </grit-part>