Revert "Reland of Remove EventSender from HTMLStyleElement"

third_party/WebKit/Source/core/html/HTMLStyleElement.cpp

Index: third_party/WebKit/Source/core/html/HTMLStyleElement.cpp
diff --git a/third_party/WebKit/Source/core/html/HTMLStyleElement.cpp b/third_party/WebKit/Source/core/html/HTMLStyleElement.cpp
index c037066adc2f9b28cdf42d92ef91843f2e3554ed..30e7791b8f84847f0bab669b8617b3856d8bf645 100644
--- a/third_party/WebKit/Source/core/html/HTMLStyleElement.cpp
+++ b/third_party/WebKit/Source/core/html/HTMLStyleElement.cpp
@@ -30,6 +30,8 @@
 #include "core/dom/TaskRunnerHelper.h"
 #include "core/dom/shadow/ShadowRoot.h"
 #include "core/events/Event.h"
+#include "public/platform/Platform.h"
+#include "public/platform/WebScheduler.h"
 
 namespace blink {
 
@@ -107,9 +109,13 @@ const AtomicString& HTMLStyleElement::type() const {
 }
 
 void HTMLStyleElement::dispatchPendingEvent(
-    std::unique_ptr<IncrementLoadEventDelayCount>) {
+    std::unique_ptr<IncrementLoadEventDelayCount> count) {
   dispatchEvent(Event::create(m_loadedSheet ? EventTypeNames::load
                                             : EventTypeNames::error));
+
+  count.reset();
+  if (document().frame())
+    document().frame()->loader().checkCompleted();
 }
 
 void HTMLStyleElement::notifyLoadedSheetAndAllCriticalSubresources(
@@ -119,6 +125,7 @@ void HTMLStyleElement::notifyLoadedSheetAndAllCriticalSubresources(
     return;
   m_loadedSheet = isLoadEvent;
   TaskRunnerHelper::get(TaskType::DOMManipulation, &document())
+
       ->postTask(
           BLINK_FROM_HERE,
           WTF::bind(