diff --git a/mozilla/htmlparser/robot/nsRobotSink.cpp b/mozilla/htmlparser/robot/nsRobotSink.cpp
index 233e7570da2..931b465b44f 100644
--- a/mozilla/htmlparser/robot/nsRobotSink.cpp
+++ b/mozilla/htmlparser/robot/nsRobotSink.cpp
@@ -75,6 +75,8 @@ public:
   NS_IMETHOD SetParser(nsIParser* aParser) { return NS_OK; }
 
   NS_IMETHOD DoFragment(PRBool aFlag);
+  NS_IMETHOD BeginContext(PRInt32 aPosition){ return NS_OK; }
+  NS_IMETHOD EndContext(PRInt32 aPosition){ return NS_OK; }
 
   // nsIRobotSink
   NS_IMETHOD Init(nsIURL* aDocumentURL);
diff --git a/mozilla/parser/htmlparser/robot/nsRobotSink.cpp b/mozilla/parser/htmlparser/robot/nsRobotSink.cpp
index 233e7570da2..931b465b44f 100644
--- a/mozilla/parser/htmlparser/robot/nsRobotSink.cpp
+++ b/mozilla/parser/htmlparser/robot/nsRobotSink.cpp
@@ -75,6 +75,8 @@ public:
   NS_IMETHOD SetParser(nsIParser* aParser) { return NS_OK; }
 
   NS_IMETHOD DoFragment(PRBool aFlag);
+  NS_IMETHOD BeginContext(PRInt32 aPosition){ return NS_OK; }
+  NS_IMETHOD EndContext(PRInt32 aPosition){ return NS_OK; }
 
   // nsIRobotSink
   NS_IMETHOD Init(nsIURL* aDocumentURL);