diff -r 000000000000 -r 6474c204b198 parser/html/nsHtml5TokenizerLoopPolicies.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/parser/html/nsHtml5TokenizerLoopPolicies.h	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,47 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef nsHtml5TokenizerLoopPolicies_h
+#define nsHtml5TokenizerLoopPolicies_h
+
+/**
+ * This policy does not report tokenizer transitions anywhere. To be used
+ * when _not_ viewing source.
+ */
+struct nsHtml5SilentPolicy
+{
+  static const bool reportErrors = false;
+  static int32_t transition(nsHtml5Highlighter* aHighlighter,
+                            int32_t aState,
+                            bool aReconsume,
+                            int32_t aPos)
+  {
+    return aState;
+  }
+  static void completedNamedCharacterReference(nsHtml5Highlighter* aHighlighter)
+  {
+  }
+};
+
+/**
+ * This policy reports the tokenizer transitions to a highlighter. To be used
+ * when viewing source.
+ */
+struct nsHtml5ViewSourcePolicy
+{
+  static const bool reportErrors = true;
+  static int32_t transition(nsHtml5Highlighter* aHighlighter,
+                            int32_t aState,
+                            bool aReconsume,
+                            int32_t aPos)
+  {
+    return aHighlighter->Transition(aState, aReconsume, aPos);
+  }
+  static void completedNamedCharacterReference(nsHtml5Highlighter* aHighlighter)
+  {
+    aHighlighter->CompletedNamedCharacterReference();
+  }
+};
+
+#endif // nsHtml5TokenizerLoopPolicies_h