Images from content:url() aren't loading if the alt attribute is present

Source/core/html/HTMLImageElement.cpp

Index: Source/core/html/HTMLImageElement.cpp
diff --git a/Source/core/html/HTMLImageElement.cpp b/Source/core/html/HTMLImageElement.cpp
index a79a7be988dcae4eeadc310ec544dcba798f002b..f6d39f0c885c1a734ffba8092e779063de159c56 100644
--- a/Source/core/html/HTMLImageElement.cpp
+++ b/Source/core/html/HTMLImageElement.cpp
@@ -46,6 +46,7 @@
 #include "core/layout/LayoutBlockFlow.h"
 #include "core/layout/LayoutImage.h"
 #include "core/page/Page.h"
+#include "core/style/ContentData.h"
 #include "platform/ContentType.h"
 #include "platform/EventDispatchForbiddenScope.h"
 #include "platform/MIMETypeRegistry.h"
@@ -330,12 +331,13 @@ ImageCandidate HTMLImageElement::findBestFitImageFromPictureParent()
 
 LayoutObject* HTMLImageElement::createLayoutObject(const ComputedStyle& style)
 {
+    const ContentData* contentData = style.contentData();
+    if (contentData && contentData->isImage() && !toImageContentData(contentData)->image()->cachedImage()->errorOccurred())
+        return LayoutObject::createObject(this, style);
+
     if (m_useFallbackContent)
         return new LayoutBlockFlow(this);
 
-    if (style.hasContent())
-        return LayoutObject::createObject(this, style);
-
     LayoutImage* image = new LayoutImage(this);
     image->setImageResource(LayoutImageResource::create());
     image->setImageDevicePixelRatio(m_imageDevicePixelRatio);
@@ -699,6 +701,12 @@ void HTMLImageElement::didAddUserAgentShadowRoot(ShadowRoot&)
     HTMLImageFallbackHelper::createAltTextShadowTree(*this);
 }
 
+void HTMLImageElement::ensureFallbackForGeneratedContent()
+{
+    setUseFallbackContent();
+    reattachFallbackContent();
+}
+
 void HTMLImageElement::ensureFallbackContent()
 {
     if (m_useFallbackContent || m_isFallbackImage)