Hack around dart:io being loaded into non-service isolates in Dartium.

runtime/lib/mirrors.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 "lib/mirrors.h"
 
 #include "lib/invocation_mirror.h"
 #include "vm/bootstrap_natives.h"
 #include "vm/class_finalizer.h"
 #include "vm/compiler.h"
@@ skipping 366 matching lines @@
   const Array& args = Array::Handle(Array::New(3));
   args.SetAt(0, MirrorReference::Handle(MirrorReference::New(lib)));
   String& str = String::Handle();
   str = lib.name();
   args.SetAt(1, str);
   str = lib.url();
   if (str.Equals("dart:_builtin") || str.Equals("dart:_blink")) {
     // Censored library (grumble).
     return Instance::null();
   }
+  if (str.Equals("dart:io")) {
+    // Hack around dart:io being loaded into non-service isolates in Dartium.
+    Isolate* isolate = Isolate::Current();

[siva, 2015/08/03 23:37:21]

We are trying to deprecate the Isolate api when creating handles so it would be
preferable to switch to the thread api i.e use Thread::Current()

[rmacnak, 2015/08/03 23:59:20]

Done.

+    const GrowableObjectArray& libraries = GrowableObjectArray::Handle(
+      isolate, isolate->object_store()->libraries());
+    Library& other_lib = Library::Handle(isolate);
+    String& other_uri = String::Handle(isolate);
+    for (intptr_t i = 0; i < libraries.Length(); i++) {
+      other_lib ^= libraries.At(i);
+      other_uri = other_lib.url();
+      if (other_uri.Equals("dart:html")) {
+        return Instance::null();
+      }
+    }
+  }
   args.SetAt(2, str);
   return CreateMirror(Symbols::_LocalLibraryMirror(), args);
 }
 
 
 static RawInstance* CreateCombinatorMirror(const Object& identifiers,
                                            bool is_show) {
   const Array& args = Array::Handle(Array::New(2));
   args.SetAt(0, identifiers);
   args.SetAt(1, Bool::Get(is_show));
@@ skipping 1683 matching lines @@
 }
 
 DEFINE_NATIVE_ENTRY(TypeMirror_subtypeTest, 2) {
   GET_NON_NULL_NATIVE_ARGUMENT(AbstractType, a, arguments->NativeArgAt(0));
   GET_NON_NULL_NATIVE_ARGUMENT(AbstractType, b, arguments->NativeArgAt(1));
   return Bool::Get(a.IsSubtypeOf(b, NULL)).raw();
 }
 
 
 }  // namespace dart