Implement BlindReference object and provide couple of liveedit-specific structures

src/contexts.h

Index: src/contexts.h
diff --git a/src/contexts.h b/src/contexts.h
index 9baf072119012d798c85691690ddbd739d765aa9..98ebc479f74e8834e3d77c89aea9d23aa8cfc4d5 100644
--- a/src/contexts.h
+++ b/src/contexts.h
@@ -95,6 +95,7 @@ enum ContextLookupFlags {
     call_as_constructor_delegate) \
   V(EMPTY_SCRIPT_INDEX, Script, empty_script) \
   V(SCRIPT_FUNCTION_INDEX, JSFunction, script_function) \
+  V(OPAQUE_REFERENCE_FUNCTION_INDEX, JSFunction, opaque_reference_function) \
   V(CONTEXT_EXTENSION_FUNCTION_INDEX, JSFunction, context_extension_function) \
   V(OUT_OF_MEMORY_INDEX, Object, out_of_memory) \
   V(MAP_CACHE_INDEX, Object, map_cache) \
@@ -216,6 +217,7 @@ class Context: public FixedArray {
     CALL_AS_CONSTRUCTOR_DELEGATE_INDEX,
     EMPTY_SCRIPT_INDEX,
     SCRIPT_FUNCTION_INDEX,
+    OPAQUE_REFERENCE_FUNCTION_INDEX,
     CONTEXT_EXTENSION_FUNCTION_INDEX,
     OUT_OF_MEMORY_INDEX,
     MAP_CACHE_INDEX,