--- a/dom/base/Element.cpp
+++ b/dom/base/Element.cpp
@@ -913,17 +913,17 @@ Element::GetClientAreaRect()
   // SVG nodes reach here and just return 0
   return nsRect(0, 0, 0, 0);
 }
 
 already_AddRefed<DOMRect>
 Element::GetBoundingClientRect()
 {
   RefPtr<DOMRect> rect = new DOMRect(this);
-  
+
   nsIFrame* frame = GetPrimaryFrame(Flush_Layout);
   if (!frame) {
     // display:none, perhaps? Return the empty rect
     return rect.forget();
   }
 
   nsRect r = nsLayoutUtils::GetAllInFlowRectsUnion(frame,
           nsLayoutUtils::GetContainingBlockForClientRect(frame),
@@ -1457,17 +1457,17 @@ Element::BindToTree(nsIDocument* aDocume
                   "We should be passed the right binding parent");
 
 #ifdef MOZ_XUL
   // First set the binding parent
   nsXULElement* xulElem = nsXULElement::FromContent(this);
   if (xulElem) {
     xulElem->SetXULBindingParent(aBindingParent);
   }
-  else 
+  else
 #endif
   {
     if (aBindingParent) {
       nsDOMSlots *slots = DOMSlots();
 
       slots->mBindingParent = aBindingParent; // Weak, so no addref happens.
     }
   }
@@ -1517,17 +1517,17 @@ Element::BindToTree(nsIDocument* aDocume
 
   // Finally, set the document
   if (aDocument) {
     // Notify XBL- & nsIAnonymousContentCreator-generated
     // anonymous content that the document is changing.
     // XXXbz ordering issues here?  Probably not, since ChangeDocumentFor is
     // just pretty broken anyway....  Need to get it working.
     // XXXbz XBL doesn't handle this (asserts), and we don't really want
-    // to be doing this during parsing anyway... sort this out.    
+    // to be doing this during parsing anyway... sort this out.
     //    aDocument->BindingManager()->ChangeDocumentFor(this, nullptr,
     //                                                   aDocument);
 
     // We no longer need to track the subtree pointer (and in fact we'll assert
     // if we do this any later).
     ClearSubtreeRootPointer();
 
     // Being added to a document.
@@ -1841,17 +1841,17 @@ Element::UnbindFromTree(bool aDeep, bool
     if (clearBindingParent) {
       slots->mBindingParent = nullptr;
     }
     if (aNullParent || !mParent->IsInShadowTree()) {
       slots->mContainingShadow = nullptr;
     }
   }
 
-  // This has to be here, rather than in nsGenericHTMLElement::UnbindFromTree, 
+  // This has to be here, rather than in nsGenericHTMLElement::UnbindFromTree,
   //  because it has to happen after unsetting the parent pointer, but before
   //  recursively unbinding the kids.
   if (IsHTMLElement()) {
     ResetDir(this);
   }
 
   if (aDeep) {
     // Do the kids. Don't call GetChildCount() here since that'll force
@@ -2533,17 +2533,17 @@ Element::GetAttrInfo(int32_t aNamespaceI
   int32_t index = mAttrsAndChildren.IndexOfAttr(aName, aNamespaceID);
   if (index >= 0) {
     return nsAttrInfo(mAttrsAndChildren.AttrNameAt(index),
                       mAttrsAndChildren.AttrAt(index));
   }
 
   return nsAttrInfo(nullptr, nullptr);
 }
-  
+
 
 bool
 Element::GetAttr(int32_t aNameSpaceID, nsIAtom* aName,
                  nsAString& aResult) const
 {
   DOMString str;
   bool haveAttr = GetAttr(aNameSpaceID, aName, str);
   str.ToString(aResult);
@@ -2554,17 +2554,17 @@ int32_t
 Element::FindAttrValueIn(int32_t aNameSpaceID,
                          nsIAtom* aName,
                          AttrValuesArray* aValues,
                          nsCaseTreatment aCaseSensitive) const
 {
   NS_ASSERTION(aName, "Must have attr name");
   NS_ASSERTION(aNameSpaceID != kNameSpaceID_Unknown, "Must have namespace");
   NS_ASSERTION(aValues, "Null value array");
-  
+
   const nsAttrValue* val = mAttrsAndChildren.GetAttr(aName, aNameSpaceID);
   if (val) {
     for (int32_t i = 0; aValues[i]; ++i) {
       if (val->Equals(*aValues[i], aCaseSensitive)) {
         return i;
       }
     }
     return ATTR_VALUE_NO_MATCH;
@@ -2758,26 +2758,26 @@ Element::List(FILE* out, int32_t aIndent
     fprintf(out, " ranges:%d", ranges ? ranges->Count() : 0);
   }
   fprintf(out, " primaryframe=%p", static_cast<void*>(GetPrimaryFrame()));
   fprintf(out, " refcount=%" PRIuPTR "<", mRefCnt.get());
 
   nsIContent* child = GetFirstChild();
   if (child) {
     fputs("\n", out);
-    
+
     for (; child; child = child->GetNextSibling()) {
       child->List(out, aIndent + 1);
     }
 
     for (indent = aIndent; --indent >= 0; ) fputs("  ", out);
   }
 
   fputs(">\n", out);
-  
+
   Element* nonConstThis = const_cast<Element*>(this);
 
   // XXX sXBL/XBL2 issue! Owner or current document?
   nsIDocument *document = OwnerDoc();
 
   // Note: not listing nsIAnonymousContentCreator-created content...
 
   nsBindingManager* bindingManager = document->BindingManager();
@@ -3515,17 +3515,17 @@ Element::InsertAdjacentHTML(const nsAStr
     destination = this;
   }
 
   nsIDocument* doc = OwnerDoc();
 
   // Needed when insertAdjacentHTML is used in combination with contenteditable
   mozAutoDocUpdate updateBatch(doc, UPDATE_CONTENT_MODEL, true);
   nsAutoScriptLoaderDisabler sld(doc);
-  
+
   // Batch possible DOMSubtreeModified events.
   mozAutoSubtreeModified subtree(doc, nullptr);
 
   // Parse directly into destination if possible
   if (doc->IsHTMLDocument() && !OwnerDoc()->MayHaveDOMMutationObservers() &&
       (position == eBeforeEnd ||
        (position == eAfterEnd && !GetNextSibling()) ||
        (position == eAfterBegin && !GetFirstChild()))) {