Bug 1434399 part 16. Remove nsIXULDocument::OnDocumentParserError. r=mystor

MozReview-Commit-ID: 7LbPTqKzkO4

dom/xul/XULDocument.h

@@ -111,7 +111,10 @@ public:
      * Sometimes the caller of OnPrototypeLoadDone resumes the walk itself
      */
     nsresult OnPrototypeLoadDone(bool aResumeWalk);
-    bool OnDocumentParserError() override;
+    /**
+     * Callback notifying when a document could not be parsed properly.
+     */
+    bool OnDocumentParserError();
 
     // nsINode interface overrides
     virtual nsresult Clone(mozilla::dom::NodeInfo *aNodeInfo, nsINode **aResult,

dom/xul/nsIXULDocument.h

@@ -35,11 +35,6 @@ class nsIXULDocument : public nsISupports
 public:
   NS_DECLARE_STATIC_IID_ACCESSOR(NS_IXULDOCUMENT_IID)
 
-  /**
-   * Callback notifying when a document could not be parsed properly.
-   */
-  virtual bool OnDocumentParserError() = 0;
-
   /**
    * Reset the document direction so that it is recomputed.
    */

dom/xul/nsXULContentSink.cpp

@@ -32,7 +32,6 @@
 #include "nsNameSpaceManager.h"
 #include "nsParserBase.h"
 #include "nsViewManager.h"
-#include "nsIXULDocument.h"
 #include "nsIScriptSecurityManager.h"
 #include "nsLayoutCID.h"
 #include "nsNetUtil.h"
@@ -54,6 +53,7 @@
 #include "nsIConsoleService.h"
 #include "nsIScriptError.h"
 #include "nsContentTypeParser.h"
+#include "XULDocument.h"
 
 static mozilla::LazyLogModule gContentSinkLog("nsXULContentSink");;
 
@@ -674,7 +674,7 @@ XULContentSinkImpl::ReportError(const char16_t* aErrorText,
     return NS_OK;
   };
 
-  nsCOMPtr<nsIXULDocument> doc = do_QueryReferent(mDocument);
+  XULDocument* doc = idoc ? idoc->AsXULDocument() : nullptr;
   if (doc && !doc->OnDocumentParserError()) {
     // The overlay was broken.  Don't add a messy element to the master doc.
     return NS_OK;