Debug a mystery crash bug in script streaming.

src/parser.h

Index: src/parser.h
diff --git a/src/parser.h b/src/parser.h
index 40886f669d828eca47abfa81a808bd310cec3c63..5cbb19aabb43aeece712e35d80b409ce90c51a84 100644
--- a/src/parser.h
+++ b/src/parser.h
@@ -850,6 +850,10 @@ class Parser : public ParserBase<ParserTraits> {
   int use_counts_[v8::Isolate::kUseCounterFeatureCount];
   int total_preparse_skipped_;
   HistogramTimer* pre_parse_timer_;
+
+  // Temporary; for debugging. See Parser::SkipLazyFunctionBody. TODO(marja):
+  // remove this once done.
+  ScriptCompiler::CompileOptions debug_saved_compile_options_;
 };