Add functionality to get full stack trace when exceptions are thrown.

runtime/vm/raw_object_snapshot.cc

Index: runtime/vm/raw_object_snapshot.cc
===================================================================
--- runtime/vm/raw_object_snapshot.cc	(revision 19105)
+++ runtime/vm/raw_object_snapshot.cc	(working copy)
@@ -2402,6 +2402,14 @@
     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);
+
     return result.raw();
   }
   UNREACHABLE();  // Stacktraces are not sent in a snapshot.