Check the condition for animation policy of bitmapImage on notifyFinished.

Source/core/rendering/RenderImage.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2000 Dirk Mueller (mueller@kde.org)
  *           (C) 2006 Allan Sandfeld Jensen (kde@carewolf.com)
  *           (C) 2006 Samuel Weinig (sam.weinig@gmail.com)
  * Copyright (C) 2003, 2004, 2005, 2006, 2008, 2009, 2010, 2011 Apple Inc. All rights reserved.
  * Copyright (C) 2010 Google Inc. All rights reserved.
  * Copyright (C) Research In Motion Limited 2011-2012. All rights reserved.
  *
@@ skipping 185 matching lines @@
 void RenderImage::notifyFinished(Resource* newImage)
 {
     if (!m_imageResource)
         return;
 
     if (documentBeingDestroyed())
         return;
 
     invalidateBackgroundObscurationStatus();
 
-    if (newImage == m_imageResource->cachedImage()) {
+    ImageResource* image = m_imageResource->cachedImage();
+    if (newImage == image) {
         // tell any potential compositing layers
         // that the image is done and they can reference it directly.
         contentChanged(ImageChanged);
     }
+
+    if (image)
+        image->updateImageAnimationPolicy();

[fs, 2015/02/02 10:31:26]

This doesn't appear to cover all the cases compared to previously - the old way,
all RenderObject ImageResourceClients would "weigh in" to the outcome, but now
only RenderImage will (I'd expect at least RenderSVGImage to weigh in too, but
there could be other non-RenderImage-derived cases I'm missing...)

Also, if image != newImage, wouldn't you want this to be newImage? (I see the
issue with the type here.)

Additionally, if transforming "pull" to "push" it seems the value could be
looked up and passed directly, and hence avoid looping at all?

 }
 
 void RenderImage::paintReplaced(const PaintInfo& paintInfo, const LayoutPoint& paintOffset)
 {
     ImagePainter(*this).paintReplaced(paintInfo, paintOffset);
 }
 
 void RenderImage::paint(const PaintInfo& paintInfo, const LayoutPoint& paintOffset)
 {
     ImagePainter(*this).paint(paintInfo, paintOffset);
@@ skipping 167 matching lines @@
         return 0;
 
     ImageResource* cachedImage = m_imageResource->cachedImage();
     if (cachedImage && cachedImage->image() && cachedImage->image()->isSVGImage())
         return toSVGImage(cachedImage->image())->embeddedContentBox();
 
     return 0;
 }
 
 } // namespace blink