Fix http://dartbug.com/23578:

runtime/vm/dart.cc

 // Copyright (c) 2013, 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 "vm/dart.h"
 
 #include "vm/code_observers.h"
 #include "vm/cpu.h"
 #include "vm/dart_api_state.h"
 #include "vm/dart_entry.h"
@@ skipping 100 matching lines @@
   ASSERT(predefined_handles_ == NULL);
   predefined_handles_ = new ReadOnlyHandles();
   // Create the VM isolate and finish the VM initialization.
   ASSERT(thread_pool_ == NULL);
   thread_pool_ = new ThreadPool();
   {
     ASSERT(vm_isolate_ == NULL);
     ASSERT(Flags::Initialized());
     const bool is_vm_isolate = true;
     Thread::EnsureInit();
-    vm_isolate_ = Isolate::Init("vm-isolate", is_vm_isolate);
+
+    // Setup default flags for the VM isolate.
+    Isolate::Flags vm_flags;
+    Dart_IsolateFlags api_flags;
+    vm_flags.CopyTo(&api_flags);
+    vm_isolate_ = Isolate::Init("vm-isolate", api_flags, is_vm_isolate);
+
     StackZone zone(vm_isolate_);
     HandleScope handle_scope(vm_isolate_);
     Heap::Init(vm_isolate_,
                0,  // New gen size 0; VM isolate should only allocate in old.
                FLAG_old_gen_heap_size * MBInWords,
                FLAG_external_max_size * MBInWords);
     ObjectStore::Init(vm_isolate_);
     TargetCPUFeatures::InitOnce();
     Object::InitOnce(vm_isolate_);
     ArgumentsDescriptor::InitOnce();
@@ skipping 87 matching lines @@
   TargetCPUFeatures::Cleanup();
 #endif
 
   Profiler::Shutdown();
   CodeObservers::DeleteAll();
 
   return NULL;
 }
 
 
-Isolate* Dart::CreateIsolate(const char* name_prefix) {
+Isolate* Dart::CreateIsolate(const char* name_prefix,
+                             const Dart_IsolateFlags& api_flags) {
   // Create a new isolate.
-  Isolate* isolate = Isolate::Init(name_prefix);
+  Isolate* isolate = Isolate::Init(name_prefix, api_flags);
   ASSERT(isolate != NULL);
   return isolate;
 }
 
 
 RawError* Dart::InitializeIsolate(const uint8_t* snapshot_buffer, void* data) {
   // Initialize the new isolate.
   Isolate* isolate = Isolate::Current();
   TIMERSCOPE(isolate, time_isolate_initialization);
   ASSERT(isolate != NULL);
@@ skipping 107 matching lines @@
   return predefined_handles_->handles_.AllocateScopedHandle();
 }
 
 
 bool Dart::IsReadOnlyHandle(uword address) {
   ASSERT(predefined_handles_ != NULL);
   return predefined_handles_->handles_.IsValidScopedHandle(address);
 }
 
 }  // namespace dart