Bug 1550524 part 1. Make NewHtml5Parser() return an nsHtml5Parser. r=hsivonen

Differential Revision: https://phabricator.services.mozilla.com/D30750

--HG--
extra : moz-landing-system : lando

dom/html/nsHTMLDocument.cpp

@@ -542,18 +542,20 @@ nsresult nsHTMLDocument::StartDocumentLoad(const char* aCommand,
   nsCOMPtr<nsIDocShell> docShell(do_QueryInterface(aContainer));
 
   bool loadWithPrototype = false;
+  RefPtr<nsHtml5Parser> html5Parser;
   if (loadAsHtml5) {
-    mParser = nsHtml5Module::NewHtml5Parser();
+    html5Parser = nsHtml5Module::NewHtml5Parser();
+    mParser = html5Parser;
     if (mIsPlainText) {
       if (viewSource) {
-        mParser->MarkAsNotScriptCreated("view-source-plain");
+        html5Parser->MarkAsNotScriptCreated("view-source-plain");
       } else {
-        mParser->MarkAsNotScriptCreated("plain-text");
+        html5Parser->MarkAsNotScriptCreated("plain-text");
       }
     } else if (viewSource && !html) {
-      mParser->MarkAsNotScriptCreated("view-source-xml");
+      html5Parser->MarkAsNotScriptCreated("view-source-xml");
     } else {
-      mParser->MarkAsNotScriptCreated(aCommand);
+      html5Parser->MarkAsNotScriptCreated(aCommand);
     }
   } else if (xhtml && ShouldUsePrototypeDocument(aChannel, this)) {
     loadWithPrototype = true;
@@ -691,7 +693,7 @@ nsresult nsHTMLDocument::StartDocumentLoad(const char* aCommand,
     }
   } else {
     if (loadAsHtml5) {
-      nsHtml5Module::Initialize(mParser, this, uri, docShell, aChannel);
+      html5Parser->Initialize(this, uri, docShell, aChannel);
     } else {
       // about:blank *only*
       nsCOMPtr<nsIHTMLContentSink> htmlsink;
@@ -1178,8 +1180,9 @@ Document* nsHTMLDocument::Open(const Optional<nsAString>& /* unused */,
   // Step 14 -- create a new parser associated with document.  This also does
   // step 16 implicitly.
   mParserAborted = false;
-  mParser = nsHtml5Module::NewHtml5Parser();
-  nsHtml5Module::Initialize(mParser, this, GetDocumentURI(), shell, nullptr);
+  RefPtr<nsHtml5Parser> parser = nsHtml5Module::NewHtml5Parser();
+  mParser = parser;
+  parser->Initialize(this, GetDocumentURI(), shell, nullptr);
   if (mReferrerPolicySet) {
     // CSP may have set the referrer policy, so a speculative parser should
     // start with the new referrer policy.

parser/html/nsHtml5Module.cpp

@@ -60,21 +60,12 @@ void nsHtml5Module::ReleaseStatics() {
 }
 
 // static
-already_AddRefed<nsIParser> nsHtml5Module::NewHtml5Parser() {
+already_AddRefed<nsHtml5Parser> nsHtml5Module::NewHtml5Parser() {
   MOZ_ASSERT(sNsHtml5ModuleInitialized, "nsHtml5Module not initialized.");
-  nsCOMPtr<nsIParser> rv = new nsHtml5Parser();
+  RefPtr<nsHtml5Parser> rv = new nsHtml5Parser();
   return rv.forget();
 }
 
-// static
-nsresult nsHtml5Module::Initialize(nsIParser* aParser, dom::Document* aDoc,
-                                   nsIURI* aURI, nsISupports* aContainer,
-                                   nsIChannel* aChannel) {
-  MOZ_ASSERT(sNsHtml5ModuleInitialized, "nsHtml5Module not initialized.");
-  nsHtml5Parser* parser = static_cast<nsHtml5Parser*>(aParser);
-  return parser->Initialize(aDoc, aURI, aContainer, aChannel);
-}
-
 class nsHtml5ParserThreadTerminator final : public nsIObserver {
  public:
   NS_DECL_ISUPPORTS

parser/html/nsHtml5Module.h

@@ -5,17 +5,15 @@
 #ifndef nsHtml5Module_h
 #define nsHtml5Module_h
 
-#include "nsIParser.h"
 #include "nsIThread.h"
 
+class nsHtml5Parser;
+
 class nsHtml5Module {
  public:
   static void InitializeStatics();
   static void ReleaseStatics();
-  static already_AddRefed<nsIParser> NewHtml5Parser();
-  static nsresult Initialize(nsIParser* aParser, mozilla::dom::Document* aDoc,
-                             nsIURI* aURI, nsISupports* aContainer,
-                             nsIChannel* aChannel);
+  static already_AddRefed<nsHtml5Parser> NewHtml5Parser();
   static nsIThread* GetStreamParserThread();
 
  private: