Check in animation policy extension.

ui/accessibility/extensions/strings/accessibility_extensions_strings.grd

 <?xml version="1.0" encoding="UTF-8"?>
 
 <!-- Strings for all extensions.  Each message should be named with the
      name of the extension as a prefix, e.g. IDS_ALT_APP_NAME. -->
 
 <grit base_dir="." current_release="1" enc_check="möl" latest_public_release="0" source_lang_id="en">
   <outputs>
     <output filename="_locales/am/messages.json" type="chrome_messages_json" lang="am"/>
     <output filename="_locales/ar/messages.json" type="chrome_messages_json" lang="ar"/>
     <output filename="_locales/bg/messages.json" type="chrome_messages_json" lang="bg"/>
@@ skipping 290 matching lines @@
       <message desc="OK button for the color enhancer setup." name="IDS_COLOR_ENHANCER_OK">
         OK
       </message>
       <message desc="Cancel button for the color enhancer setup." name="IDS_COLOR_ENHANCER_CANCEL">
         Cancel
       </message>
       <message desc="Button for the color enhancer popup that opens the Setup part of the popup." name="IDS_COLOR_ENHANCER_SETUP_BUTTON">
         Setup
       </message>
 
+      <!-- Animation extension -->
+
+      <message desc="The title of the extension that controls whether images can animate or not, displayed in the web store." name="IDS_ANIMATION_APPNAME">
+        Animation Policy
+      </message>
+      <message desc="The description of the extension that allows users to disable animations or run them only once." name="IDS_ANIMATION_APPDESC">
+        Run animations only once, or disable animation completely.
+      </message>
+      <message desc="The title of a group of radio buttons controlling the animation policy - whether animation is allowed, allowed once only, or disabled." name="IDS_ANIMATION_POLICY">
+        Animation Policy:
+      </message>
+      <message desc="Indicates that showing animated images is allowed" name="IDS_ANIMATION_ALLOWED">
+        Allow all animated images.
+      </message>
+      <message desc="Indicates that showing animated images should only happen one time" name="IDS_ANIMATION_ONCE">
+        Allow animated images, but only once.
+      </message>
+      <message desc="Indicates that there will be no image animation" name="IDS_ANIMATION_NONE">
+        Disable all image animation.
+      </message>
+
     </messages>
   </release>
 </grit>