Add new extension APIs related to animation policy.

chrome/browser/accessibility/animation_policy_prefs.cc

Index: chrome/browser/accessibility/animation_policy_prefs.cc
diff --git a/chrome/browser/accessibility/animation_policy_prefs.cc b/chrome/browser/accessibility/animation_policy_prefs.cc
new file mode 100644
index 0000000000000000000000000000000000000000..a2ebf4ac7d4a161b3782a12a5bd6990ffcae6777
--- /dev/null
+++ b/chrome/browser/accessibility/animation_policy_prefs.cc
@@ -0,0 +1,21 @@
+// Copyright (c) 2015 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.
+
+#include "chrome/browser/accessibility/animation_policy_prefs.h"
+
+#include "chrome/common/pref_names.h"
+#include "components/pref_registry/pref_registry_syncable.h"
+
+namespace chrome {
+
+const char kAnimationPolicyAllowed[] = "allowed";
+const char kAnimationPolicyOnce[] = "once";
+const char kAnimationPolicyNone[] = "none";
+
+void RegisterAnimationPolicyPrefs(user_prefs::PrefRegistrySyncable* registry) {
+  registry->RegisterStringPref(prefs::kAnimationPolicy, kAnimationPolicyAllowed,
+                               user_prefs::PrefRegistrySyncable::SYNCABLE_PREF);
+}
+
+}  // namespace chrome