Have HTMLElements / SVGElements constructors take a Document reference in argument

Source/core/html/track/TextTrackCue.cpp

Index: Source/core/html/track/TextTrackCue.cpp
diff --git a/Source/core/html/track/TextTrackCue.cpp b/Source/core/html/track/TextTrackCue.cpp
index 1625698eb2845b6a46e0be76298895577049856c..6648b225d356206781ac4d5836f6514693ef04a9 100644
--- a/Source/core/html/track/TextTrackCue.cpp
+++ b/Source/core/html/track/TextTrackCue.cpp
@@ -92,7 +92,7 @@ static const String& verticalGrowingRightKeyword()
 
 // ----------------------------
 
-TextTrackCueBox::TextTrackCueBox(Document* document, TextTrackCue* cue)
+TextTrackCueBox::TextTrackCueBox(Document& document, TextTrackCue* cue)
     : HTMLDivElement(divTag, document)
     , m_cue(cue)
 {
@@ -204,7 +204,7 @@ TextTrackCue::TextTrackCue(ScriptExecutionContext* context, double start, double
     , m_isActive(false)
     , m_pauseOnExit(false)
     , m_snapToLines(true)
-    , m_cueBackgroundBox(HTMLDivElement::create(toDocument(context)))
+    , m_cueBackgroundBox(HTMLDivElement::create(*toDocument(context)))
     , m_displayTreeShouldChange(true)
     , m_displayDirection(CSSValueLtr)
 {
@@ -228,7 +228,8 @@ TextTrackCue::~TextTrackCue()
 
 PassRefPtr<TextTrackCueBox> TextTrackCue::createDisplayTree()
 {
-    return TextTrackCueBox::create(ownerDocument(), this);
+    ASSERT(ownerDocument());
+    return TextTrackCueBox::create(*ownerDocument(), this);
 }
 
 PassRefPtr<TextTrackCueBox> TextTrackCue::displayTreeInternal()