Convert DeviceManagerDelegate to PermissionProvider mojo interface.

device/devices_app/usb/public/interfaces/permission_provider.mojom

Index: device/devices_app/usb/public/interfaces/permission_provider.mojom
diff --git a/device/devices_app/usb/public/interfaces/permission_provider.mojom b/device/devices_app/usb/public/interfaces/permission_provider.mojom
new file mode 100644
index 0000000000000000000000000000000000000000..cb32d3a93913776f3719af79f929139aba71f56c
--- /dev/null
+++ b/device/devices_app/usb/public/interfaces/permission_provider.mojom
@@ -0,0 +1,13 @@
+// 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.
+
+module device.usb;
+
+import "device.mojom";
+
+interface PermissionProvider {
+  // filters a set of |requested_guids| down to the set of |allowed_guids| that

[Ken Rockot(use gerrit already), 2015/09/02 22:42:33]

nit: Filters

[Reilly Grant (use Gerrit), 2015/09/02 23:58:19]

Done.

+  // should be accessible to clients of the DeviceManager instance.
+  HasDevicePermission(array<string> requested_guids) => (array<string> allowed_guids);

[Ken Rockot(use gerrit already), 2015/09/02 22:42:33]

nit: > 80 chars Preferred wrapping for mojom would be:

  HasDevicepermission(array<string> requested_guides)
      => (array<string> allowed_guids);

[Reilly Grant (use Gerrit), 2015/09/02 23:58:19]

Done.

+};