Reland: Add webusb permission bubble mojom

content/child/mojo/type_converters.h

Index: content/child/mojo/type_converters.h
diff --git a/content/child/mojo/type_converters.h b/content/child/mojo/type_converters.h
new file mode 100644
index 0000000000000000000000000000000000000000..37a5e5a523a1b176cc2c71275c4788086667bf97
--- /dev/null
+++ b/content/child/mojo/type_converters.h
@@ -0,0 +1,20 @@
+// 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.
+
+#include "third_party/WebKit/public/platform/WebVector.h"
+#include "third_party/mojo/src/mojo/public/cpp/bindings/array.h"
+
+namespace mojo {
+
+template <typename T, typename U>
+struct TypeConverter<Array<T>, blink::WebVector<U>> {
+  static Array<T> Convert(const blink::WebVector<U>& vector) {
+    Array<T> array(vector.size());
+    for (size_t i = 0; i < vector.size(); ++i)
+      array[i] = TypeConverter<T, U>::Convert(vector[i]);
+    return array.Pass();
+  }
+};
+
+}  // namespace mojo