Check in animation policy extension.

ui/accessibility/extensions/strings/accessibility_extensions_strings.grd

Index: ui/accessibility/extensions/strings/accessibility_extensions_strings.grd
diff --git a/ui/accessibility/extensions/strings/accessibility_extensions_strings.grd b/ui/accessibility/extensions/strings/accessibility_extensions_strings.grd
index 33c4f60c9f3284530d59b82b23cde05e567f16c1..e27b54fde00f09687cde2e17917534fad648fa0f 100644
--- a/ui/accessibility/extensions/strings/accessibility_extensions_strings.grd
+++ b/ui/accessibility/extensions/strings/accessibility_extensions_strings.grd
@@ -308,6 +308,27 @@
         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>