Revert of Use Shadow DOM to display fallback content for images

Source/core/html/HTMLImageLoader.cpp

Index: Source/core/html/HTMLImageLoader.cpp
diff --git a/Source/core/html/HTMLImageLoader.cpp b/Source/core/html/HTMLImageLoader.cpp
index 5af5a3ca463c31b49fdfe36f96d70faf035722fd..44fc879fe2f85abc3b3d5fe90ff5fef691766d39 100644
--- a/Source/core/html/HTMLImageLoader.cpp
+++ b/Source/core/html/HTMLImageLoader.cpp
@@ -26,6 +26,7 @@
 #include "core/dom/Element.h"
 #include "core/events/Event.h"
 #include "core/fetch/ImageResource.h"
+#include "core/html/HTMLImageElement.h"
 #include "core/html/HTMLObjectElement.h"
 #include "core/html/parser/HTMLParserIdioms.h"
 #include "platform/Logging.h"
@@ -60,27 +61,17 @@
     return stripLeadingAndTrailingHTMLSpaces(attr);
 }
 
-void HTMLImageLoader::noImageResourceToLoad()
-{
-    // FIXME: Use fallback content even when there is no alt-text. The only blocker is the large amount of rebaselining it requires.
-    if (!toHTMLElement(element())->altText().isEmpty())
-        toHTMLElement(element())->ensureFallbackContent();
-}
-
 void HTMLImageLoader::notifyFinished(Resource*)
 {
     ImageResource* cachedImage = image();
 
+    RefPtrWillBeRawPtr<Element> element = this->element();
     ImageLoader::notifyFinished(cachedImage);
 
     bool loadError = cachedImage->errorOccurred() || cachedImage->response().httpStatusCode() >= 400;
-    if (loadError)
-        toHTMLElement(element())->ensureFallbackContent();
-    else
-        toHTMLElement(element())->ensurePrimaryContent();
 
-    if (loadError && isHTMLObjectElement(element()))
-        toHTMLObjectElement(element())->renderFallbackContent();
+    if (loadError && isHTMLObjectElement(*element))
+        toHTMLObjectElement(element)->renderFallbackContent();
 }
 
 }