Implements getImageAnimationPolicy() at ImageLoader.

Source/core/fetch/ImageResource.cpp

Index: Source/core/fetch/ImageResource.cpp
diff --git a/Source/core/fetch/ImageResource.cpp b/Source/core/fetch/ImageResource.cpp
index 61ba6527e741ecb0fb573845da6e9cbcc070d6bc..084746f1826ea2ef5981a2aa52078c4a47c36dfa 100644
--- a/Source/core/fetch/ImageResource.cpp
+++ b/Source/core/fetch/ImageResource.cpp
@@ -103,6 +103,8 @@ void ImageResource::didAddClient(ResourceClient* c)
     if (m_image && !m_image->isNull())
         static_cast<ImageResourceClient*>(c)->imageChanged(this);
 
+    if (m_image && m_image->animationPolicy() == ImageAnimationPolicyInvalid)
+        updateImageAnimationPolicy();
     Resource::didAddClient(c);
 }
 
@@ -433,7 +435,7 @@ void ImageResource::updateImageAnimationPolicy()
     if (!m_image)
         return;
 
-    ImageAnimationPolicy newPolicy = ImageAnimationPolicyAllowed;
+    ImageAnimationPolicy newPolicy = ImageAnimationPolicyInvalid;
     ResourceClientWalker<ImageResourceClient> w(m_clients);
     while (ImageResourceClient* c = w.next()) {
         if (c->getImageAnimationPolicy(this, newPolicy))