Add new extension APIs related to animation policy.

chrome/common/extensions/api/accessibility_features.json

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 [
   {
     "namespace": "accessibilityFeatures",
-    "platforms": ["chromeos"],
     "description": "Use the <code>chrome.accessibilityFeatures</code> API to manage Chrome's accessibility features. This API relies on the <a href='types#ChromeSetting'>ChromeSetting prototype of the type API</a> for getting and setting individual accessibility features. In order to get feature states the extension must request <code>accessibilityFeatures.read</code> permission. For modifying feature state, the extension needs <code>accessibilityFeatures.modify</code> permission. Note that <code>accessibilityFeatures.modify</code> does not imply <code>accessibilityFeatures.read</code> permission.",
     "properties": {
       "spokenFeedback": {
         "$ref": "types.ChromeSetting",
         "description": "Spoken feedback (text-to-speech). The value indicates whether the feature is enabled or not. <code>get()</code> requires <code>accessibilityFeatures.read</code> permission. <code>set()</code> and <code>clear()</code> require <code>accessibilityFeatures.modify</code> permission.",
         "value": ["spokenFeedback", {"type": "boolean"}]
       },
       "largeCursor": {
         "$ref": "types.ChromeSetting",
         "description": "Enlarged cursor. The value indicates whether the feature is enabled or not. <code>get()</code> requires <code>accessibilityFeatures.read</code> permission. <code>set()</code> and <code>clear()</code> require <code>accessibilityFeatures.modify</code> permission.",
@@ skipping 16 matching lines @@
       },
       "autoclick": {
         "$ref": "types.ChromeSetting",
         "description":"Auto mouse click after mouse stops moving. The value indicates whether the feature is enabled or not. <code>get()</code> requires <code>accessibilityFeatures.read</code> permission. <code>set()</code> and <code>clear()</code> require <code>accessibilityFeatures.modify</code> permission.",
         "value": ["autoclick", {"type": "boolean"}]
       },
       "virtualKeyboard": {
         "$ref": "types.ChromeSetting",
         "description": "Virtual on-screen keyboard. The value indicates whether the feature is enabled or not. <code>get()</code> requires <code>accessibilityFeatures.read</code> permission. <code>set()</code> and <code>clear()</code> require <code>accessibilityFeatures.modify</code> permission.",
         "value": ["virtualKeyboard", {"type": "boolean"}]
+      },
+      "animationPolicy": {
+        "$ref": "types.ChromeSetting",
+        "description": "<code>get()</code> requires <code>accessibilityFeatures.read</code> permission. <code>set()</code> and <code>clear()</code> require <code>accessibilityFeatures.modify</code> permission.",
+        "value": [
+          "animationPolicy", {
+            "type": "string",
+            "enum": [{
+                "description": "Images are allowed to animate.",
+                "name": "allowed"
+              }, {
+                "description": "Images are animated once.",
+                "name": "once"
+              }, {
+                "description": "Images are not animated.",
+                "name": "none"
+              }]
+          }
+          ]
       }
     }
   }
 ]