Revert of Add webusb permission bubble mojom

content/child/mojo/type_converters.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.
-
-#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