Bug 453531: Remove dead mIsPopup member from nsXULDocument. r+sr=sicking.

content/xul/document/src/nsXULDocument.cpp

@@ -272,16 +272,6 @@ nsXULDocument::~nsXULDocument()
         if (mDocumentURI)
             nsXULPrototypeCache::GetInstance()->RemoveFromFastLoadSet(mDocumentURI);
     }
-
-    // The destructor of nsDocument will delete references to style
-    // sheets, but we don't want that if we're a popup document, so
-    // then we'll clear the stylesheets array here to prevent that
-    // from happening.
-    if (mIsPopup) {
-        mStyleSheets.Clear();
-        mStyleAttrStyleSheet = nsnull;
-        mAttrStyleSheet = nsnull;
-    }
 }
 
 nsresult

content/xul/document/src/nsXULDocument.h

@@ -206,8 +206,6 @@ protected:
 
     nsresult GetViewportSize(PRInt32* aWidth, PRInt32* aHeight);
 
-    void SetIsPopup(PRBool isPopup) { mIsPopup = isPopup; }
-
     nsresult PrepareToLoad(nsISupports* aContainer,
                            const char* aCommand,
                            nsIChannel* aChannel,
@@ -278,7 +276,6 @@ protected:
     // the element's namespace has no registered ID attribute name.
     nsTHashtable<nsRefMapEntry> mRefMap;
     nsCOMPtr<nsIRDFDataSource> mLocalStore;
-    PRPackedBool               mIsPopup;
     PRPackedBool               mApplyingPersistedAttrs;
     PRPackedBool               mIsWritingFastLoad;
     PRPackedBool               mDocumentLoaded;