Bug 1403658 - Add nsString overload for HTMLAnchorElement::GetName() and HTMLBodyElement::GetBackground(), add HTMLBodyElement::FromContentOrNull(). r=bz

dom/html/HTMLAnchorElement.h

@@ -201,6 +201,10 @@ public:
   {
     GetHTMLAttr(nsGkAtoms::name, aValue);
   }
+  void GetName(nsAString& aValue)
+  {
+    GetHTMLAttr(nsGkAtoms::name, aValue);
+  }
   void SetName(const nsAString& aValue, mozilla::ErrorResult& rv)
   {
     SetHTMLAttr(nsGkAtoms::name, aValue, rv);

dom/html/HTMLBodyElement.h

@@ -32,6 +32,8 @@ public:
   // nsISupports
   NS_DECL_ISUPPORTS_INHERITED
 
+  NS_IMPL_FROMCONTENT_HTML_WITH_TAG(HTMLBodyElement, body);
+
   // Event listener stuff; we need to declare only the ones we need to
   // forward to window that don't come from nsIDOMHTMLBodyElement.
 #define EVENT(name_, id_, type_, struct_) /* nothing; handled by the shim */
@@ -112,6 +114,10 @@ public:
   {
     GetHTMLAttr(nsGkAtoms::background, aBackground);
   }
+  void GetBackground(nsAString& aBackground)
+  {
+    GetHTMLAttr(nsGkAtoms::background, aBackground);
+  }
   void SetBackground(const nsAString& aBackground, ErrorResult& aError)
   {
     SetHTMLAttr(nsGkAtoms::background, aBackground, aError);