Add decode() functionality to image elements.

third_party/WebKit/Source/core/loader/ImageLoader.cpp

Index: third_party/WebKit/Source/core/loader/ImageLoader.cpp
diff --git a/third_party/WebKit/Source/core/loader/ImageLoader.cpp b/third_party/WebKit/Source/core/loader/ImageLoader.cpp
index e8ae4504733451c83cb94b70a27cc76fb6455d83..afa8a49a8c45a76e699ef606e56ee62bc92cdb80 100644
--- a/third_party/WebKit/Source/core/loader/ImageLoader.cpp
+++ b/third_party/WebKit/Source/core/loader/ImageLoader.cpp
@@ -488,6 +488,11 @@ void ImageLoader::imageNotifyFinished(ImageResourceContent* resource) {
   if (m_image && m_image->getImage() && m_image->getImage()->isSVGImage())
     toSVGImage(m_image->getImage())->updateUseCounters(element()->document());
 
+  if (isHTMLImageElement(m_element)) {
+    toHTMLImageElement(m_element)->imageNotifyFinished(
+        !resource->errorOccurred());
+  }
+
   if (!m_hasPendingLoadEvent)
     return;