Bug 1479860: Remove unused aCompileEventHandlers argument from BindToTree. r=bz

Mostly automatic via sed. Only parts which I touched manually (apart from a
couple ones where I fixed indentation or which had mispelled arguments) are the
callers. I may have removed a couple redundant `virtual` keywords as well when
I started to do it manually, I can revert those if wanted.

Most of them are just removing the argument, but in Element.cpp I also added an
assertion for GetBindingParent when binding the ShadowRoot's kids (the binding
parent is set from the ShadowRoot constructor, and I don't think we bind a
shadow tree during unlink or what not which could cause a behavior difference).

Differential Revision: https://phabricator.services.mozilla.com/D2574

MozReview-Commit-ID: 2oIgatty2HU

dom/html/HTMLSourceElement.cpp

@@ -143,13 +143,11 @@ HTMLSourceElement::AfterSetAttr(int32_t aNameSpaceID, nsAtom* aName,
 nsresult
 HTMLSourceElement::BindToTree(nsIDocument *aDocument,
                               nsIContent *aParent,
-                              nsIContent *aBindingParent,
-                              bool aCompileEventHandlers)
+                              nsIContent *aBindingParent)
 {
   nsresult rv = nsGenericHTMLElement::BindToTree(aDocument,
                                                  aParent,
-                                                 aBindingParent,
-                                                 aCompileEventHandlers);
+                                                 aBindingParent);
   NS_ENSURE_SUCCESS(rv, rv);
 
   if (auto* media = HTMLMediaElement::FromNodeOrNull(aParent)) {