Add new extension APIs related to animation policy.

chrome/browser/extensions/api/preference/preference_api.cc

Index: chrome/browser/extensions/api/preference/preference_api.cc
diff --git a/chrome/browser/extensions/api/preference/preference_api.cc b/chrome/browser/extensions/api/preference/preference_api.cc
index f1023511a38a7325bdc8ae0d85129f62ffbd4166..b952bb8a8822173822a5ce0662df2fc2d9302617 100644
--- a/chrome/browser/extensions/api/preference/preference_api.cc
+++ b/chrome/browser/extensions/api/preference/preference_api.cc
@@ -23,6 +23,7 @@
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/common/pref_names.h"
 #include "components/translate/core/common/translate_pref_names.h"
+#include "content/public/browser/browser_accessibility_state.h"
 #include "content/public/browser/notification_details.h"
 #include "content/public/browser/notification_source.h"
 #include "extensions/browser/extension_pref_value_map.h"
@@ -118,6 +119,12 @@ PrefMappingEntry kPrefMapping[] = {
      APIPermission::kAccessibilityFeaturesRead,
      APIPermission::kAccessibilityFeaturesModify},
 #endif
+    // accessibilityFeatures.animationPolicy is available for
+    // all platforms but the others from accessibilityFeatures
+    // is only avaiable for OS_CHROMEOS.
+    {"animationPolicy", prefs::kAnimationPolicy,
+     APIPermission::kAccessibilityFeaturesRead,
+     APIPermission::kAccessibilityFeaturesModify}
 };
 
 class IdentityPrefTransformer : public PrefTransformerInterface {
@@ -450,6 +457,17 @@ PreferenceAPI::PreferenceAPI(content::BrowserContext* context)
     EventRouter::Get(profile_)->RegisterObserver(this, event_name);
   }
   content_settings_store()->AddObserver(this);
+
+  PrefService* prefs = profile_->GetPrefs();
+  pref_change_registrar_.Init(prefs);
+  base::Closure animation_callback = base::Bind(
+      &PreferenceAPI::UpdateAnimationPolicy, base::Unretained(this));
+  pref_change_registrar_.Add(prefs::kAnimationPolicy, animation_callback);
+}
+
+void PreferenceAPI::UpdateAnimationPolicy() {
+  content::BrowserAccessibilityState::GetInstance()
+    ->UpdateAnimationPolicy();
 }
 
 PreferenceAPI::~PreferenceAPI() {