diff -r 000000000000 -r 6474c204b198 content/base/src/nsScriptElement.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/content/base/src/nsScriptElement.cpp	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,141 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "nsScriptElement.h"
+#include "mozilla/BasicEvents.h"
+#include "mozilla/EventDispatcher.h"
+#include "mozilla/dom/Element.h"
+#include "nsContentUtils.h"
+#include "nsPresContext.h"
+#include "nsScriptLoader.h"
+#include "nsIParser.h"
+#include "nsAutoPtr.h"
+#include "nsGkAtoms.h"
+#include "nsContentSink.h"
+
+using namespace mozilla;
+using namespace mozilla::dom;
+
+NS_IMETHODIMP
+nsScriptElement::ScriptAvailable(nsresult aResult,
+                                 nsIScriptElement *aElement,
+                                 bool aIsInline,
+                                 nsIURI *aURI,
+                                 int32_t aLineNo)
+{
+  if (!aIsInline && NS_FAILED(aResult)) {
+    return FireErrorEvent();
+  }
+  return NS_OK;
+}
+
+/* virtual */ nsresult
+nsScriptElement::FireErrorEvent()
+{
+  nsCOMPtr<nsIContent> cont =
+    do_QueryInterface((nsIScriptElement*) this);
+
+  return nsContentUtils::DispatchTrustedEvent(cont->OwnerDoc(),
+                                              cont,
+                                              NS_LITERAL_STRING("error"),
+                                              false /* bubbles */,
+                                              false /* cancelable */);
+}
+
+NS_IMETHODIMP
+nsScriptElement::ScriptEvaluated(nsresult aResult,
+                                 nsIScriptElement *aElement,
+                                 bool aIsInline)
+{
+  nsresult rv = NS_OK;
+  if (!aIsInline) {
+    nsCOMPtr<nsIContent> cont =
+      do_QueryInterface((nsIScriptElement*) this);
+
+    nsRefPtr<nsPresContext> presContext =
+      nsContentUtils::GetContextForContent(cont);
+
+    nsEventStatus status = nsEventStatus_eIgnore;
+    uint32_t type = NS_SUCCEEDED(aResult) ? NS_LOAD : NS_LOAD_ERROR;
+    WidgetEvent event(true, type);
+    // Load event doesn't bubble.
+    event.mFlags.mBubbles = (type != NS_LOAD);
+
+    EventDispatcher::Dispatch(cont, presContext, &event, nullptr, &status);
+  }
+
+  return rv;
+}
+
+void
+nsScriptElement::CharacterDataChanged(nsIDocument *aDocument,
+                                      nsIContent* aContent,
+                                      CharacterDataChangeInfo* aInfo)
+{
+  MaybeProcessScript();
+}
+
+void
+nsScriptElement::AttributeChanged(nsIDocument* aDocument,
+                                  Element* aElement,
+                                  int32_t aNameSpaceID,
+                                  nsIAtom* aAttribute,
+                                  int32_t aModType)
+{
+  MaybeProcessScript();
+}
+
+void
+nsScriptElement::ContentAppended(nsIDocument* aDocument,
+                                 nsIContent* aContainer,
+                                 nsIContent* aFirstNewContent,
+                                 int32_t aNewIndexInContainer)
+{
+  MaybeProcessScript();
+}
+
+void
+nsScriptElement::ContentInserted(nsIDocument *aDocument,
+                                 nsIContent* aContainer,
+                                 nsIContent* aChild,
+                                 int32_t aIndexInContainer)
+{
+  MaybeProcessScript();
+}
+
+bool
+nsScriptElement::MaybeProcessScript()
+{
+  nsCOMPtr<nsIContent> cont =
+    do_QueryInterface((nsIScriptElement*) this);
+
+  NS_ASSERTION(cont->DebugGetSlots()->mMutationObservers.Contains(this),
+               "You forgot to add self as observer");
+
+  if (mAlreadyStarted || !mDoneAddingChildren || !cont->IsInDoc() ||
+      mMalformed || !HasScriptContent()) {
+    return false;
+  }
+
+  FreezeUriAsyncDefer();
+
+  mAlreadyStarted = true;
+
+  nsIDocument* ownerDoc = cont->OwnerDoc();
+  nsCOMPtr<nsIParser> parser = ((nsIScriptElement*) this)->GetCreatorParser();
+  if (parser) {
+    nsCOMPtr<nsIContentSink> sink = parser->GetContentSink();
+    if (sink) {
+      nsCOMPtr<nsIDocument> parserDoc = do_QueryInterface(sink->GetTarget());
+      if (ownerDoc != parserDoc) {
+        // Willful violation of HTML5 as of 2010-12-01
+        return false;
+      }
+    }
+  }
+
+  nsRefPtr<nsScriptLoader> loader = ownerDoc->ScriptLoader();
+  return loader->ProcessScriptElement(this);
+}