Make onload async

Source/core/dom/Document.cpp

Index: Source/core/dom/Document.cpp
diff --git a/Source/core/dom/Document.cpp b/Source/core/dom/Document.cpp
index d721e4f70ef5cc5e9ed19d164121c13196463f12..b1e8f2e877fd7186efd27a8ef859384784a6db48 100644
--- a/Source/core/dom/Document.cpp
+++ b/Source/core/dom/Document.cpp
@@ -489,7 +489,7 @@ Document::Document(const DocumentInit& initializer, DocumentClassFlags documentC
     , m_contextDocument(initializer.contextDocument())
     , m_hasFullscreenElementStack(false)
     , m_loadEventDelayCount(0)
-    , m_loadEventDelayTimer(this, &Document::loadEventDelayTimerFired)
+    , m_loadEventTimer(this, &Document::loadEventTimerFired)
     , m_pluginLoadingTimer(this, &Document::pluginLoadingTimerFired)
     , m_didSetReferrerPolicy(false)
     , m_referrerPolicy(ReferrerPolicyDefault)
@@ -2509,15 +2509,19 @@ void Document::implicitClose()
     ASSERT(!inStyleRecalc());
 
     bool wasLocationChangePending = frame() && frame()->navigationScheduler().locationChangePending();
-    bool doload = !parsing() && m_parser && !processingLoadEvent() && !wasLocationChangePending;
-
     // If the load was blocked because of a pending location change and the location change triggers a same document
     // navigation, don't fire load events after the same document navigation completes (unless there's an explicit open).
-    m_loadEventProgress = LoadEventTried;
-
-    if (!doload)
+    if (parsing() || !m_parser || processingLoadEvent() || wasLocationChangePending) {
+        m_loadEventProgress = LoadEventTried;
         return;
+    }
+
+    m_loadEventProgress = LoadEventScheduled;
+    m_loadEventTimer.startOneShot(0, FROM_HERE);
+}
 
+void Document::loadEventTimerFired(Timer<Document>*)
+{
     // The call to dispatchWindowLoadEvent can detach the LocalDOMWindow and cause it (and its
     // attached Document) to be destroyed.
     RefPtrWillBeRawPtr<LocalDOMWindow> protectedWindow(this->domWindow());
@@ -2603,6 +2607,12 @@ void Document::implicitClose()
 
     if (svgExtensions())
         accessSVGExtensions().startAnimations();
+
+    if (frame()) {
+        if (Frame* parent = frame()->tree().parent())
+            toLocalFrame(parent)->loader().checkCompleted();
+        frame()->loader().checkLoadComplete();
+    }
 }
 
 bool Document::dispatchBeforeUnloadEvent(Chrome& chrome, bool& didAllowNavigation)
@@ -5149,13 +5159,13 @@ void Document::decrementLoadEventDelayCount()
     --m_loadEventDelayCount;
 
     if (!m_loadEventDelayCount)
-        checkLoadEventSoon();
+        checkLoadEvent();
 }
 
-void Document::checkLoadEventSoon()
+void Document::checkLoadEvent()
 {
-    if (frame() && !m_loadEventDelayTimer.isActive())
-        m_loadEventDelayTimer.startOneShot(0, FROM_HERE);
+    if (frame())
+        frame()->loader().checkCompleted();
 }
 
 bool Document::isDelayingLoadEvent()
@@ -5167,18 +5177,11 @@ bool Document::isDelayingLoadEvent()
     // Node destructors.
     if (ThreadState::current()->isSweepInProgress()) {
         if (!m_loadEventDelayCount)
-            checkLoadEventSoon();
+            checkLoadEvent();
         return true;
     }
 #endif
-    return m_loadEventDelayCount;
-}
-
-
-void Document::loadEventDelayTimerFired(Timer<Document>*)
-{
-    if (frame())
-        frame()->loader().checkCompleted();
+    return m_loadEventDelayCount || m_loadEventTimer.isActive();
 }
 
 void Document::loadPluginsSoon()