import changes from rmottola/Arctic-Fox:

- Bug 940273 - Part 1 - Fetch changes from maple twig to support Service Worker Cache. (5f8e82dd7)
- Bug 940273 - Part 1b - Expose nsFileProtocolHandler.h in mozilla/net. (71a3ebcf4)
- Bug 940273 - Part 2 - Add a pref to enable Service Worker Cache. (2e7b478d3)
- patch header include (3b90a9b8d)
- override -> MOZ_OVERRIDE (8f51321bc)
- override -> MOZ_OVERRIDE (5f4ab5143)
- Bug 1136563 - ARIA 1.1: Support role 'switch' (2484c9c27)
- Bug 1121518 - ARIA 1.1: Add support for role 'searchbox' (8d3ee1204)
- override -> MOZ_OVERRIDE (3db7a0cb4)
- Bug 1137714 - Make roleDescription nicer/correct/faster (da6beb861)
- Bug 1134280 - Get rid of Tag() - patch 1 - Is{HTML,XUL,MathML,SVG}Element and IsAnyOf{HTML,XUL,MathML,SVG}Elements (133801ca1)
- Bug 1134280 - Get rid of Tag() - patch 2.1 - /accessible - Fix all the occurrences (fbef71d88)
- Bug 1134280 - Get rid of Tag() - patch 2.2 - /editor - Fix all the occurrences (e54a21dcc)
- Bug 1134280 - Get rid of Tag() - patch 2.3 - dom/base and docshell - Fix all the occurrences (8bf192106)
- Bug 1134280 - Get rid of Tag() - patch 2.4 - layout/mathml - Fix all the occurrences (7914f351d)
- Bug 1134280 - Get rid of Tag() - patch 2.5 - dom/xul - Fix all the occurrences (6611b95ef)
- Bug 1134280 - Get rid of Tag() - patch 2.6 - layout/base and layout/form - Fix all the occurrences (61e06ff31)
- Bug 1134280 - Get rid of Tag() - patch 2.7 - layout/generic - Fix all the occurrences (bbe5865c2)
- Bug 1134280 - Get rid of Tag() - patch 2.8 - dom/html - Fix all the occurrences (7af471da5)
- Bug 1134280 - Get rid of Tag() - patch 2.9 - dom/svg, dom/xml, dom/xslt and dom/xbl - Fix all the occurrences (ab9769748)
- Bug 1134280 - Get rid of Tag() - patch 2.10 - dom/events, dom/mathml, dom/plugins, dom/smil - Fix all the occurrences (421ba62f4)
- Bug 1134280 - Get rid of Tag() - patch 2.11 - layout/xul - Fix all the occurrences (e19e64b2c)
- Bug 1134280 - Get rid of Tag() - patch 2.12 - layout/style, layout/svg - Fix all the occurrences (7ec90f520)
- Bug 1134280 - Get rid of Tag() - patch 2.13 - Fix all the occurrences (a887a4341)
- Bug 1134280 - Get rid of Tag() - patch 3 - nsContentUtils::IsHTMLBlock should work with nsIContent inste nsIAtom (28fa04521)
- Bug 1134280 - Get rid of Tag() - patch 4 - Get rid of nsDocumentEncoder::IsTag (ed4bf4d48)
- Bug 1134280 - Get rid of Tag() - patch 5 - nsGenericHTMLElement::IsHTMLElement (70a2822c7)
- Bug 1134280 - Get rid of Tag() - patch 6 - Remove nsINode::Tag() (85885131f)
- Bug 1134280 - Get rid of Tag() - patch 7 - Followup to fix bustage. (actuall, backport, it was missing) (cfcfa3e74)
- Bug 1134280 - Get rid of Tag() - patch 8 - Fixed a debug-only compilation issue (502319995)
- Bug 1356843 - Fix -Wcomma warnings in dom/base/ and dom/xml/. clang's -Wcomma warning warns about suspicious use of the comma operator such as between two statements or to call a function for side effects within an expression. (0f1ad0554)

dom/html/nsHTMLDocument.cpp

@@ -684,9 +684,9 @@ nsHTMLDocument::StartDocumentLoad(const char* aCommand,
     }
   }
 
-  if (!IsHTML() || !docShell) { // no docshell for text/html XHR
-    charsetSource = IsHTML() ? kCharsetFromFallback
-                             : kCharsetFromDocTypeDefault;
+  if (!IsHTMLDocument() || !docShell) { // no docshell for text/html XHR
+    charsetSource = IsHTMLDocument() ? kCharsetFromFallback
+                                     : kCharsetFromDocTypeDefault;
     charset.AssignLiteral("UTF-8");
     TryChannelCharset(aChannel, charsetSource, charset, executor);
     parserCharsetSource = charsetSource;
@@ -778,7 +778,7 @@ nsHTMLDocument::StartDocumentLoad(const char* aCommand,
   mParser->SetDocumentCharset(parserCharset, parserCharsetSource);
   mParser->SetCommand(aCommand);
 
-  if (!IsHTML()) {
+  if (!IsHTMLDocument()) {
     MOZ_ASSERT(!loadAsHtml5);
     nsCOMPtr<nsIXMLContentSink> xmlsink;
     NS_NewXMLContentSink(getter_AddRefs(xmlsink), this, uri,
@@ -863,7 +863,7 @@ nsHTMLDocument::EndLoad()
 void
 nsHTMLDocument::SetCompatibilityMode(nsCompatibility aMode)
 {
-  NS_ASSERTION(IsHTML() || aMode == eCompatibility_FullStandards,
+  NS_ASSERTION(IsHTMLDocument() || aMode == eCompatibility_FullStandards,
                "Bad compat mode for XHTML document!");
 
   mCompatMode = aMode;
@@ -1017,7 +1017,8 @@ nsHTMLDocument::GetBody()
   for (nsIContent* child = html->GetFirstChild();
        child;
        child = child->GetNextSibling()) {
-    if (child->IsHTML(nsGkAtoms::body) || child->IsHTML(nsGkAtoms::frameset)) {
+    if (child->IsHTMLElement(nsGkAtoms::body) ||
+        child->IsHTMLElement(nsGkAtoms::frameset)) {
       return static_cast<nsGenericHTMLElement*>(child);
     }
   }
@@ -1039,7 +1040,7 @@ NS_IMETHODIMP
 nsHTMLDocument::SetBody(nsIDOMHTMLElement* aBody)
 {
   nsCOMPtr<nsIContent> newBody = do_QueryInterface(aBody);
-  MOZ_ASSERT(!newBody || newBody->IsHTML(),
+  MOZ_ASSERT(!newBody || newBody->IsHTMLElement(),
              "How could we be an nsIContent but not actually HTML here?");
   ErrorResult rv;
   SetBody(static_cast<nsGenericHTMLElement*>(newBody.get()), rv);
@@ -1054,10 +1055,10 @@ nsHTMLDocument::SetBody(nsGenericHTMLElement* newBody, ErrorResult& rv)
   // The body element must be either a body tag or a frameset tag. And we must
   // have a html root tag, otherwise GetBody will not return the newly set
   // body.
-  if (!newBody || !(newBody->Tag() == nsGkAtoms::body ||
-                    newBody->Tag() == nsGkAtoms::frameset) ||
-      !root || !root->IsHTML() ||
-      root->Tag() != nsGkAtoms::html) {
+  if (!newBody ||
+      !newBody->IsAnyOfHTMLElements(nsGkAtoms::body, nsGkAtoms::frameset) ||
+      !root || !root->IsHTMLElement() ||
+      !root->IsHTMLElement(nsGkAtoms::html)) {
     rv.Throw(NS_ERROR_DOM_HIERARCHY_REQUEST_ERR);
     return;
   }
@@ -1420,7 +1421,7 @@ nsHTMLDocument::Open(JSContext* cx,
 {
   NS_ASSERTION(nsContentUtils::CanCallerAccess(static_cast<nsIDOMHTMLDocument*>(this)),
                "XOW should have caught this!");
-  if (!IsHTML() || mDisableDocWrite || !IsMasterDocument()) {
+  if (!IsHTMLDocument() || mDisableDocWrite || !IsMasterDocument()) {
     // No calling document.open() on XHTML
     rv.Throw(NS_ERROR_DOM_INVALID_STATE_ERR);
     return nullptr;
@@ -1766,7 +1767,7 @@ nsHTMLDocument::Close()
 void
 nsHTMLDocument::Close(ErrorResult& rv)
 {
-  if (!IsHTML()) {
+  if (!IsHTMLDocument()) {
     // No calling document.close() on XHTML!
 
     rv.Throw(NS_ERROR_DOM_INVALID_STATE_ERR);
@@ -1851,7 +1852,7 @@ nsHTMLDocument::WriteCommon(JSContext *cx,
     (mWriteLevel > NS_MAX_DOCUMENT_WRITE_DEPTH || mTooDeepWriteRecursion);
   NS_ENSURE_STATE(!mTooDeepWriteRecursion);
 
-  if (!IsHTML() || mDisableDocWrite || !IsMasterDocument()) {
+  if (!IsHTMLDocument() || mDisableDocWrite || !IsMasterDocument()) {
     // No calling document.write*() on XHTML!
 
     return NS_ERROR_DOM_INVALID_STATE_ERR;
@@ -1997,7 +1998,7 @@ nsHTMLDocument::GetElementsByName(const nsAString& aElementName,
 static bool MatchItems(nsIContent* aContent, int32_t aNameSpaceID, 
                        nsIAtom* aAtom, void* aData)
 {
-  if (!(aContent->IsElement() && aContent->AsElement()->IsHTML())) {
+  if (!aContent->IsHTMLElement()) {
     return false;
   }