Traverse inlined frames lazily when printing the stacktrace.

runtime/vm/raw_object_snapshot.cc

Index: runtime/vm/raw_object_snapshot.cc
===================================================================
--- runtime/vm/raw_object_snapshot.cc	(revision 27208)
+++ runtime/vm/raw_object_snapshot.cc	(working copy)
@@ -2489,15 +2489,11 @@
     // Read all the object pointer fields.
     Array& array = Array::Handle(reader->isolate());
     array ^= reader->ReadObjectRef();
-    result.set_function_array(array);
-    array ^= reader->ReadObjectRef();
     result.set_code_array(array);
     array ^= reader->ReadObjectRef();
     result.set_pc_offset_array(array);
 
     array ^= reader->ReadObjectRef();
-    result.set_catch_func_array(array);
-    array ^= reader->ReadObjectRef();
     result.set_catch_code_array(array);
     array ^= reader->ReadObjectRef();
     result.set_catch_pc_offset_array(array);