Rename {nsIDocument,nsIDocumentObserver,nsIFrame}::ContentChanged to CharacterDataChanged, since that's the only thing it's used for. Replace its nsISupports* parameter with a PRBool, since we don't need to allocate an object to pass a boolean parameter. Remove some (but probably not all) unneeded implementations on frames whose content is never a text node. b=234960 r+sr=jst

content/xslt/src/xpath/nsXPathResult.cpp

@@ -202,9 +202,9 @@ NS_IMPL_NSIDOCUMENTOBSERVER_STYLE_STUB(nsXPathResult)
 NS_IMPL_NSIDOCUMENTOBSERVER_STATE_STUB(nsXPathResult)
 
 void
-nsXPathResult::ContentChanged(nsIDocument* aDocument,
-                              nsIContent *aContent,
-                              nsISupports *aSubContent)
+nsXPathResult::CharacterDataChanged(nsIDocument* aDocument,
+                                    nsIContent *aContent,
+                                    PRBool aAppend)
 {
     Invalidate();
 }

content/xslt/src/xslt/txMozillaXSLTProcessor.cpp

@@ -846,9 +846,9 @@ txMozillaXSLTProcessor::DocumentWillBeDestroyed(nsIDocument* aDocument)
 }
 
 void
-txMozillaXSLTProcessor::ContentChanged(nsIDocument* aDocument,
-                                       nsIContent *aContent,
-                                       nsISupports *aSubContent)
+txMozillaXSLTProcessor::CharacterDataChanged(nsIDocument* aDocument,
+                                             nsIContent *aContent,
+                                             PRBool aAppend)
 {
     mStylesheet = nsnull;
 }