Add loadend event when finishing loading image

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 86f65618292a28c53500d98bb06686c25897ba40..47836a690c392217dc1b0c2f1074abad05fff3d1 100644
--- a/third_party/WebKit/Source/core/loader/ImageLoader.cpp
+++ b/third_party/WebKit/Source/core/loader/ImageLoader.cpp
@@ -547,12 +547,13 @@ void ImageLoader::timerFired(TimerBase*)
 void ImageLoader::dispatchPendingEvent(ImageEventSender* eventSender)
 {
     RESOURCE_LOADING_DVLOG(1) << "ImageLoader::dispatchPendingEvent " << this;
-    ASSERT(eventSender == &loadEventSender() || eventSender == &errorEventSender());
     const AtomicString& eventType = eventSender->eventType();
     if (eventType == EventTypeNames::load)
         dispatchPendingLoadEvent();
     if (eventType == EventTypeNames::error)
         dispatchPendingErrorEvent();
+    if (eventType == EventTypeNames::loadend)
+        dispatchPendingLoadendEvent();
 }
 
 void ImageLoader::dispatchPendingLoadEvent()
@@ -584,6 +585,15 @@ void ImageLoader::dispatchPendingErrorEvent()
     updatedHasPendingEvent();
 }
 
+void ImageLoader::dispatchPendingLoadendEvent()
+{
+    if (element()->document().frame()) {
+        dispatchLoadendEvent();
+    }
+
+    updatedHasPendingEvent();
+}
+
 bool ImageLoader::getImageAnimationPolicy(ImageAnimationPolicy& policy)
 {
     if (!element()->document().settings())