Convert users of nsAReadable[C]String and nsAWritable[C]String typedefs to [const] nsA[C]String. b=131899 r=scc sr=jag a=asa

dom/src/base/nsGlobalWindow.cpp

@@ -1938,7 +1938,7 @@ GlobalWindowImpl::CheckSecurityIsChromeCaller(PRBool *aIsChrome)
 }
 
 void
-GlobalWindowImpl::MakeScriptDialogTitle(nsAReadableString &aInTitle, nsAWritableString &aOutTitle)
+GlobalWindowImpl::MakeScriptDialogTitle(const nsAString &aInTitle, nsAString &aOutTitle)
 {
   aOutTitle.Truncate(0);