Set correct script on fields in kernel.

R=kmillikin@google.com

Review-Url: https://codereview.chromium.org/2583153002 .
diff --git a/runtime/vm/kernel_reader.cc b/runtime/vm/kernel_reader.cc
index d11e931..695d7bf 100644
--- a/runtime/vm/kernel_reader.cc
+++ b/runtime/vm/kernel_reader.cc
@@ -293,6 +293,8 @@
     const dart::String& name = H.DartFieldName(kernel_field->name());
     const AbstractType& type =
         T.TranslateTypeWithoutFinalization(kernel_field->type());
+    const Object& script_class =
+        ClassForScriptAt(klass, kernel_field->source_uri_index());
     dart::Field& field = dart::Field::Handle(
         Z, dart::Field::New(name, kernel_field->IsStatic(),
                             // In the VM all const fields are implicitly final
@@ -301,7 +303,7 @@
                             kernel_field->IsFinal() || kernel_field->IsConst(),
                             kernel_field->IsConst(),
                             false,  // is_reflectable
-                            klass, type, kernel_field->position()));
+                            script_class, type, kernel_field->position()));
     field.set_kernel_field(kernel_field);
     field.set_has_initializer(kernel_field->initializer() != NULL);
     GenerateFieldAccessors(klass, field, kernel_field);
diff --git a/runtime/vm/object.cc b/runtime/vm/object.cc
index 854b152..bd3efd6 100644
--- a/runtime/vm/object.cc
+++ b/runtime/vm/object.cc
@@ -7575,7 +7575,7 @@
                      bool is_final,
                      bool is_const,
                      bool is_reflectable,
-                     const Class& owner,
+                     const Object& owner,
                      const AbstractType& type,
                      TokenPosition token_pos) {
   ASSERT(!owner.IsNull());
diff --git a/runtime/vm/object.h b/runtime/vm/object.h
index 032b420..c721863 100644
--- a/runtime/vm/object.h
+++ b/runtime/vm/object.h
@@ -3165,7 +3165,7 @@
                        bool is_final,
                        bool is_const,
                        bool is_reflectable,
-                       const Class& owner,
+                       const Object& owner,
                        const AbstractType& type,
                        TokenPosition token_pos);