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

runtime/vm/dart.cc

Index: runtime/vm/dart.cc
diff --git a/runtime/vm/dart.cc b/runtime/vm/dart.cc
index 895d6b192b5e6fa137818d574c2d3db8b8532fe7..6f78669d2def2956f30b3384bf520729cf373fbc 100644
--- a/runtime/vm/dart.cc
+++ b/runtime/vm/dart.cc
@@ -131,9 +131,8 @@ const char* Dart::InitOnce(const uint8_t* vm_isolate_snapshot,
     const bool precompiled = instructions_snapshot != NULL;
 
     // Setup default flags for the VM isolate.
-    Isolate::Flags vm_flags;
     Dart_IsolateFlags api_flags;
-    vm_flags.CopyTo(&api_flags);
+    Isolate::FlagsInitialize(&api_flags);
     vm_isolate_ = Isolate::Init("vm-isolate", api_flags, is_vm_isolate);
     start_time_ = vm_isolate_->start_time();
     vm_isolate_->set_compilation_allowed(!precompiled);