Cleanup access to guarded_fields

runtime/vm/flow_graph.cc

Index: runtime/vm/flow_graph.cc
diff --git a/runtime/vm/flow_graph.cc b/runtime/vm/flow_graph.cc
index 4313aedd8109e3e76d11872183abc627a418af61..7cfdf5371e260770bdb6815dc8a9963802077223 100644
--- a/runtime/vm/flow_graph.cc
+++ b/runtime/vm/flow_graph.cc
@@ -48,7 +48,6 @@ FlowGraph::FlowGraph(const ParsedFunction& parsed_function,
     licm_allowed_(true),
     loop_headers_(NULL),
     loop_invariant_loads_(NULL),
-    guarded_fields_(parsed_function.guarded_fields()),
     deferred_prefixes_(parsed_function.deferred_prefixes()),
     captured_parameters_(new(zone()) BitVector(zone(), variable_count())),
     inlining_id_(-1) {
@@ -92,23 +91,6 @@ void FlowGraph::ReplaceCurrentInstruction(ForwardInstructionIterator* iterator,
 }
 
 
-
-void FlowGraph::AddToGuardedFields(
-    ZoneGrowableArray<const Field*>* array,
-    const Field* field) {
-  if ((field->guarded_cid() == kDynamicCid) ||
-      (field->guarded_cid() == kIllegalCid)) {
-    return;
-  }
-  for (intptr_t j = 0; j < array->length(); j++) {
-    if ((*array)[j]->raw() == field->raw()) {
-      return;
-    }
-  }
-  array->Add(field);
-}
-
-
 void FlowGraph::AddToDeferredPrefixes(
     ZoneGrowableArray<const LibraryPrefix*>* from) {
   ZoneGrowableArray<const LibraryPrefix*>* to = deferred_prefixes();