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

Source/platform/graphics/ImageAnimationPolicy.h

+// 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.
+
+#ifndef ImageAnimationPolicy_h
+#define ImageAnimationPolicy_h
+
+namespace blink {
+
+// ImageAnimationPolicy is used for controlling image animation
+// when image frame is rendered for animation
+
+enum ImageAnimationPolicy {
+    // Animate the image (the default).
+    ImageAnimationPolicyAllowed,
+    // Animate image just once.
+    ImageAnimationPolicyAnimateOnce,
+    // Show the first frame and do not animate.
+    ImageAnimationPolicyNoAnimation
+};
+
+} // namespace blink
+
+#endif // ImageAnimationPolicy_h