Add new extension APIs related to animation policy.

chrome/common/extensions/api/accessibility_features.json

Index: chrome/common/extensions/api/accessibility_features.json
diff --git a/chrome/common/extensions/api/accessibility_features.json b/chrome/common/extensions/api/accessibility_features.json
index 9e14bb89f3175e76feb79d83ffeb4412740ed1dc..9a2cee3f8ffb3170bb5c543bf6df2c6cb5e4e79b 100644
--- a/chrome/common/extensions/api/accessibility_features.json
+++ b/chrome/common/extensions/api/accessibility_features.json
@@ -5,7 +5,6 @@
 [
   {
     "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": {
@@ -42,6 +41,25 @@
         "$ref": "types.ChromeSetting",
         "description": "Virtual on-screen keyboard. The value indicates whether the feature is enabled or not. <code>get()</code> requires <code>accessibilityFeatures.read</code> permission. <code>set()</code> and <code>clear()</code> require <code>accessibilityFeatures.modify</code> permission.",
         "value": ["virtualKeyboard", {"type": "boolean"}]
+      },
+      "animationPolicy": {
+        "$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"
+	      }]
+          }
+	  ]
       }
     }
   }