Move chromeos::device_event_log into components.

chrome/app/chromium_strings.grd

 <?xml version="1.0" encoding="UTF-8"?>
 <!-- This file contains definitions of strings that are distribution specific.
 These strings will not be translated and only english versions will
 be available for now. -->
 
 <grit base_dir="." latest_public_release="0" current_release="1"
       source_lang_id="en" enc_check="möl">
   <outputs>
     <output filename="grit/chromium_strings.h" type="rc_header">
       <emit emit_type='prepend'></emit>
@@ skipping 1300 matching lines @@
           Chromium updates automatically so you always have the freshest version.
         </message>
         <message name="IDS_UPDATE_MSG" desc="Chrome OS OOBE: message shown during update stage.">
           Chromium updates automatically so you always have the freshest version. When this download completes, Chromium will restart and you'll be on your way.
         </message>
         <message name="IDS_EULA_SCREEN_ACCESSIBLE_TITLE" desc="Title to be spoken on opening the OOBE EULA screen">
           Chromium OS terms
         </message>
       </if>
 
+      <!-- About device logs UI display strings -->
+      <message name="IDS_DEVICE_LOG_TITLE" desc="Title of the chrome://device-log page">
+        Device Log
+      </message>
+      <message name="IDS_DEVICE_AUTO_REFRESH" desc="Instructions for how to auto-refresh the page">
+        Add a query param in URL to auto-refresh the page: chrome://device-log/?refresh=&lt;sec&gt;
+      </message>
+      <message name="IDS_DEVICE_LOG_REFRESH" desc="Button to refresh device log">
+        Refresh
+      </message>
+      <message name="IDS_DEVICE_LOG_LEVEL_SHOW" desc="'Show' label before logging level checkboxes">
+        Show:
+      </message>
+      <message name="IDS_DEVICE_LOG_LEVEL_ERROR" desc="Error logging level checkbox">
+        Error
+      </message>
+      <message name="IDS_DEVICE_LOG_LEVEL_USER" desc="User logging level checkbox">
+        User
+      </message>
+      <message name="IDS_DEVICE_LOG_LEVEL_EVENT" desc="Event logging level checkbox">
+        Event
+      </message>
+      <message name="IDS_DEVICE_LOG_LEVEL_DEBUG" desc="Debug logging level checkbox">
+        Debug
+      </message>
+      <message name="IDS_DEVICE_LOG_TYPE_LOGIN" desc="Checkbox to enable showing events of type LOGIN">
+        Login
+      </message>
+      <message name="IDS_DEVICE_LOG_TYPE_NETWORK" desc="Checkbox to enable showing events of type NETWORK">
+        Network
+      </message>
+      <message name="IDS_DEVICE_LOG_TYPE_POWER" desc="Checkbox to enable showing events of type POWER">
+        Power
+      </message>
+      <message name="IDS_DEVICE_LOG_FILEINFO" desc="File info checkbox in device event log">
+        File Info
+      </message>
+      <message name="IDS_DEVICE_LOG_TIME_DETAIL" desc="Detailed timestamps checkbox in device event log">
+        Detailed Timestamps
+      </message>
+      <message name="IDS_DEVICE_LOG_ENTRY" desc="Format string for lines in chrome://device-log.">
+        [<ph name="TIMESTAMP">$1<ex>Timestamp</ex></ph>]
+        <ph name="FILE_INFO">$2<ex>file:123</ex></ph>
+        <ph name="EVENT_NAME">$3<ex>Event Description</ex></ph>
+      </message>
+
     </messages>
   </release>
 </grit>