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

runtime/lib/isolate.cc

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "include/dart_native_api.h"
 #include "platform/assert.h"
 #include "vm/bootstrap_natives.h"
 #include "vm/class_finalizer.h"
 #include "vm/dart.h"
 #include "vm/dart_api_impl.h"
@@ skipping 133 matching lines @@
     Dart_IsolateCreateCallback callback = Isolate::CreateCallback();
     if (callback == NULL) {
       state_->DecrementSpawnCount();
       ReportError(
           "Isolate spawn is not supported by this Dart implementation\n");
       delete state_;
       state_ = NULL;
       return;
     }
 
-    Dart_IsolateFlags api_flags;
-    state_->isolate_flags()->CopyTo(&api_flags);
+    // Make a copy of the state's isolate flags and hand it to the callback.
+    Dart_IsolateFlags api_flags = *(state_->isolate_flags());
 
     Isolate* isolate = reinterpret_cast<Isolate*>(
         (callback)(state_->script_url(),
                    state_->function_name(),
                    state_->package_root(),
                    state_->package_config(),
                    &api_flags,
                    state_->init_data(),
                    &error));
     state_->DecrementSpawnCount();
@@ skipping 218 matching lines @@
           isolate->spawn_count_monitor(),
           isolate->spawn_count(),
           paused.value(),
           fatal_errors,
           on_exit_port,
           on_error_port);
 
   // If we were passed a value then override the default flags state for
   // checked mode.
   if (!checked.IsNull()) {
-    state->isolate_flags()->set_checked(checked.value());
+    bool val = checked.value();
+    Dart_IsolateFlags* flags = state->isolate_flags();
+    flags->enable_asserts = val;
+    flags->enable_type_checks = val;
   }
 
   ThreadPool::Task* spawn_task = new SpawnIsolateTask(state);
 
   isolate->IncrementSpawnCount();
   if (FLAG_i_like_slow_isolate_spawn) {
     // We block the parent isolate while the child isolate loads.
     Isolate* saved = Isolate::Current();
     Thread::ExitIsolate();
     spawn_task->Run();
@@ skipping 41 matching lines @@
   MessageWriter writer(&data, &allocator, false);
   writer.WriteMessage(msg);
 
   PortMap::PostMessage(new Message(port.Id(),
                                    data, writer.BytesWritten(),
                                    Message::kOOBPriority));
   return Object::null();
 }
 
 }  // namespace dart