[IndexedDB] Closing mojo connections when renderer quits

mojo/public/cpp/bindings/strong_associated_binding_set.h

Index: mojo/public/cpp/bindings/strong_associated_binding_set.h
diff --git a/mojo/public/cpp/bindings/strong_associated_binding_set.h b/mojo/public/cpp/bindings/strong_associated_binding_set.h
new file mode 100644
index 0000000000000000000000000000000000000000..8c769698ba3924b9e7be2439bc349c0d5a028345
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+++ b/mojo/public/cpp/bindings/strong_associated_binding_set.h
@@ -0,0 +1,25 @@
+// Copyright 2017 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef MOJO_PUBLIC_CPP_BINDINGS_STRONG_ASSOCIATED_BINDING_SET_H_
+#define MOJO_PUBLIC_CPP_BINDINGS_STRONG_ASSOCIATED_BINDING_SET_H_
+
+#include "mojo/public/cpp/bindings/associated_binding.h"
+#include "mojo/public/cpp/bindings/associated_binding_set.h"
+#include "mojo/public/cpp/bindings/associated_interface_ptr.h"
+#include "mojo/public/cpp/bindings/associated_interface_request.h"
+#include "mojo/public/cpp/bindings/binding_set.h"
+#include "mojo/public/cpp/bindings/unique_ptr_impl_ref_traits.h"
+
+namespace mojo {
+
+template <typename Interface, typename ContextType = void>
+using StrongAssociatedBindingSet = BindingSetBase<
+    Interface,
+    AssociatedBinding<Interface, UniquePtrImplRefTraits<Interface>>,
+    ContextType>;
+
+}  // namespace mojo
+
+#endif  // MOJO_PUBLIC_CPP_BINDINGS_STRONG_ASSOCIATED_BINDING_SET_H_