MD Settings: Add MIDI devices to Content Settings

chrome/app/settings_strings.grdp

 <?xml version="1.0" encoding="utf-8"?>
 <!-- Settings-specific strings (included from generated_resources.grd). -->
 <grit-part>
   <!-- Main Page -->
   <if expr="chromeos">
     <message name="IDS_SETTINGS_SECONDARY_USER_BANNER" desc="Banner displayed in settings page when the user is secondary in a multi-profile session.">
       Some settings belonging to <ph name="PRIMARY_EMAIL">$1<ex>john@google.com</ex></ph> are being shared with you. These settings only affect your account when using multiple sign-in.
     </message>
   </if>
 
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     <message name="IDS_SETTINGS_SITE_SETTINGS_PROTECTED_CONTENT_IDENTIFIERS_EXPLANATION" desc="Text that is displayed on the Protected Content section of Content Settings. This text explains that enabling protected content may require using a uniquely identifiable machine identifier.">
       Some content services use unique identifiers for the purposes of authorizing access to protected content.
     </message>
     <message name="IDS_SETTINGS_SITE_SETTINGS_PROTECTED_CONTENT_ENABLE_IDENTIFIERS" desc="The label of the checkbox for enabling machine identifiers to uniquely identiy the user for protected content.">
       Allow identifiers for protected content (computer restart may be required)
     </message>
   </if>
   <message name="IDS_SETTINGS_SITE_SETTINGS_UNSANDBOXED_PLUGINS" desc="Label for the unsandboxed plugin access site settings.">
     Unsandboxed plugin access
   </message>
+  <message name="IDS_SETTINGS_SITE_SETTINGS_MIDI_DEVICES" desc="Label for the MIDI devices in site settings.">
+    MIDI devices
+  </message>
+  <message name="IDS_SETTINGS_SITE_SETTINGS_MIDI_DEVICES_ASK" desc="The ask label for MIDI devices in site settings.">
+    Ask when a site wants to use system exclusive messages to access MIDI devices
+  </message>
+  <message name="IDS_SETTINGS_SITE_SETTINGS_MIDI_DEVICES_ASK_RECOMMENDED" desc="The ask label for MIDI devices in site settings (with the 'recommended' suffix).">
+    Ask when a site wants to use system exclusive messages to access MIDI devices (recommended)
+  </message>
+  <message name="IDS_SETTINGS_SITE_SETTINGS_MIDI_DEVICES_BLOCK" desc="The block label for MIDI devices in site settings.">
+    Do not allow any sites to use system exclusive messages to access MIDI devices
+  </message>
   <message name="IDS_SETTINGS_SITE_SETTINGS_USB_DEVICES" desc="Label for the USB devices in site settings.">
     USB devices
   </message>
   <message name="IDS_SETTINGS_SITE_SETTINGS_ZOOM_LEVELS" desc="Label for the Zoom levels category in site settings.">
     Zoom levels
   </message>
   <message name="IDS_SETTINGS_SITE_SETTINGS_MAY_SAVE_COOKIES" desc="Label for the cookies option description site settings.">
     Sites can save and read cookie data
   </message>
   <message name="IDS_SETTINGS_SITE_SETTINGS_ASK_FIRST" desc="Label for ask first option in site settings.">
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       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>