mandoline filesystem: add a sqlite3 vfs to proxy filesystem usage.

mojo/util/capture_util.h

+// Copyright 2015 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_UTIL_CAPTURE_UTIL_H_
+#define MOJO_UTIL_CAPTURE_UTIL_H_
+
+#include "mojo/public/cpp/bindings/lib/template_util.h"
+
+namespace mojo {
+
+template <typename T1>
+mojo::Callback<void(T1)> Capture(T1* t1) {
+  return [t1](T1 got_t1) { *t1 = mojo::internal::Forward(got_t1); };
+}
+
+template <typename T1, typename T2>
+mojo::Callback<void(T1, T2)> Capture(T1* t1, T2* t2) {
+  return [t1, t2](T1 got_t1, T2 got_t2) {
+    *t1 = mojo::internal::Forward(got_t1);
+    *t2 = mojo::internal::Forward(got_t2);
+  };
+}
+
+template <typename T1, typename T2, typename T3>
+mojo::Callback<void(T1, T2, T3)> Capture(T1* t1, T2* t2, T3* t3) {
+  return [t1, t2, t3](T1 got_t1, T2 got_t2, T3 got_t3) {
+    *t1 = mojo::internal::Forward(got_t1);
+    *t2 = mojo::internal::Forward(got_t2);
+    *t3 = mojo::internal::Forward(got_t3);
+  };
+}
+
+}  // namespace mojo
+
+#endif  // MOJO_UTIL_CAPTURE_UTIL_H_