Expose setting API to set ImageAnimationPolicy(Allowed, Once, None)

Source/web/WebSettingsImpl.cpp

Index: Source/web/WebSettingsImpl.cpp
diff --git a/Source/web/WebSettingsImpl.cpp b/Source/web/WebSettingsImpl.cpp
index 512f266c001a2980a44b2d1fcf4573d9adea8eee..fe9147dbb660de802ee302fb4e1685e6a7f33a42 100644
--- a/Source/web/WebSettingsImpl.cpp
+++ b/Source/web/WebSettingsImpl.cpp
@@ -276,6 +276,11 @@ void WebSettingsImpl::setImagesEnabled(bool enabled)
     m_settings->setImagesEnabled(enabled);
 }
 
+void WebSettingsImpl::setAnimatedImageType(AnimatedImageType type)
+{
+    m_settings->setAnimatedImageType(static_cast<blink::AnimatedImageType>(type));
+}
+
 void WebSettingsImpl::setLoadWithOverviewMode(bool enabled)
 {
     m_settings->setLoadWithOverviewMode(enabled);