Fix for bustage due to channel retargeting changes.

docshell/base/nsWebShell.cpp

@@ -784,6 +784,12 @@ NS_IMPL_QUERY_HEAD(nsWebShell)
    NS_IMPL_QUERY_BODY(nsICapabilities)
 NS_IMPL_QUERY_TAIL(nsIWebShell)
 
+NS_IMETHODIMP
+nsWebShell::QueryCapability(const nsIID &aIID, void** aInstancePtr)
+{
+  return GetInterface(aIID, aInstancePtr);
+}
+
 NS_IMETHODIMP
 nsWebShell::GetInterface(const nsIID &aIID, void** aInstancePtr)
 {

webshell/src/nsWebShell.cpp

@@ -784,6 +784,12 @@ NS_IMPL_QUERY_HEAD(nsWebShell)
    NS_IMPL_QUERY_BODY(nsICapabilities)
 NS_IMPL_QUERY_TAIL(nsIWebShell)
 
+NS_IMETHODIMP
+nsWebShell::QueryCapability(const nsIID &aIID, void** aInstancePtr)
+{
+  return GetInterface(aIID, aInstancePtr);
+}
+
 NS_IMETHODIMP
 nsWebShell::GetInterface(const nsIID &aIID, void** aInstancePtr)
 {