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

Source/core/fetch/ImageResource.cpp

 /*
     Copyright (C) 1998 Lars Knoll (knoll@mpi-hd.mpg.de)
     Copyright (C) 2001 Dirk Mueller (mueller@kde.org)
     Copyright (C) 2002 Waldo Bastian (bastian@kde.org)
     Copyright (C) 2006 Samuel Weinig (sam.weinig@gmail.com)
     Copyright (C) 2004, 2005, 2006, 2007 Apple Inc. All rights reserved.
 
     This library is free software; you can redistribute it and/or
     modify it under the terms of the GNU Library General Public
     License as published by the Free Software Foundation; either
@@ skipping 452 matching lines @@
     return true;
 }
 
 void ImageResource::animationAdvanced(const blink::Image* image)
 {
     if (!image || image != m_image)
         return;
     notifyObservers();
 }
 
+void ImageResource::imageAnimationPolicy(const blink::Image* image, ImageAnimationPolicy& policy)
+{
+    if (!image || image != m_image)
+        return;
+
+    ResourceClientWalker<ImageResourceClient> w(m_clients);
+    while (ImageResourceClient* c = w.next()) {
+        if (c->getImageAnimationPolicy(this, policy))
+            return;
+    }
+}
+
 void ImageResource::changedInRect(const blink::Image* image, const IntRect& rect)
 {
     if (!image || image != m_image)
         return;
     notifyObservers(&rect);
 }
 
 bool ImageResource::currentFrameKnownToBeOpaque(const RenderObject* renderer)
 {
     blink::Image* image = imageForRenderer(renderer);
     if (image->isBitmapImage()) {
         TRACE_EVENT1(TRACE_DISABLED_BY_DEFAULT("devtools.timeline"), "PaintImage", "data", InspectorPaintImageEvent::data(renderer, *this));
         image->nativeImageForCurrentFrame(); // force decode
     }
     return image->currentFrameKnownToBeOpaque();
 }
 
 bool ImageResource::isAccessAllowed(SecurityOrigin* securityOrigin)
 {
     if (response().wasFetchedViaServiceWorker())
         return response().serviceWorkerResponseType() != WebServiceWorkerResponseTypeOpaque;
     if (!image()->currentFrameHasSingleSecurityOrigin())
         return false;
     if (passesAccessControlCheck(securityOrigin))
         return true;
     return !securityOrigin->taintsCanvas(response().url());
 }
 
 } // namespace blink