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

runtime/lib/mirrors.cc

Index: runtime/lib/mirrors.cc
diff --git a/runtime/lib/mirrors.cc b/runtime/lib/mirrors.cc
index 33af2717f8a97e10db31046f1d1bde7e427611ba..e7236ed3c8844027caa7acc7d81c870f5556d314 100644
--- a/runtime/lib/mirrors.cc
+++ b/runtime/lib/mirrors.cc
@@ -384,6 +384,21 @@ static RawInstance* CreateLibraryMirror(const Library& lib) {
     // 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);
 }