- Remove Isolate::Flags structure and store flags directly in isolate.

runtime/vm/intrinsifier_arm64.cc

Index: runtime/vm/intrinsifier_arm64.cc
diff --git a/runtime/vm/intrinsifier_arm64.cc b/runtime/vm/intrinsifier_arm64.cc
index 5358741ba3a90ff0b7cd4fc3df63537d51a59df4..f12ea8de6931b69e556f1cf97b89e8b0642e2623 100644
--- a/runtime/vm/intrinsifier_arm64.cc
+++ b/runtime/vm/intrinsifier_arm64.cc
@@ -34,7 +34,7 @@ intptr_t Intrinsifier::ParameterSlotFromSp() { return -1; }
 // Intrinsify only for Smi value and index. Non-smi values need a store buffer
 // update. Array length is always a Smi.
 void Intrinsifier::ObjectArraySetIndexed(Assembler* assembler) {
-  if (Isolate::Current()->flags().type_checks()) {
+  if (Isolate::Current()->type_checks()) {
     return;
   }
 
@@ -107,7 +107,7 @@ void Intrinsifier::GrowableArray_Allocate(Assembler* assembler) {
 // On stack: growable array (+1), value (+0).
 void Intrinsifier::GrowableArray_add(Assembler* assembler) {
   // In checked mode we need to type-check the incoming argument.
-  if (Isolate::Current()->flags().type_checks()) {
+  if (Isolate::Current()->type_checks()) {
     return;
   }
   Label fall_through;