mojo leveldb: Add an iteration interface.

components/leveldb/public/cpp/BUILD.gn

Index: components/leveldb/public/cpp/BUILD.gn
diff --git a/components/leveldb/public/cpp/BUILD.gn b/components/leveldb/public/cpp/BUILD.gn
new file mode 100644
index 0000000000000000000000000000000000000000..29e773a7643a1654ca879b30310dd41ba6f1fbc2
--- /dev/null
+++ b/components/leveldb/public/cpp/BUILD.gn
@@ -0,0 +1,20 @@
+# Copyright 2016 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.
+
+source_set("cpp") {
+  sources = [
+    "remote_iterator.cc",
+    "remote_iterator.h",
+    "util.cc",
+    "util.h",
+  ]
+
+  deps = [
+    "//base",
+    "//components/leveldb/public/interfaces",
+    "//mojo/common",
+    "//mojo/shell/public/cpp",
+    "//third_party/leveldatabase",
+  ]
+}