mediaview: Add a typemap for arc::mojom::ChangeType.

components/arc/file_system/file_system_struct_traits.cc

Index: components/arc/file_system/file_system_struct_traits.cc
diff --git a/components/arc/file_system/file_system_struct_traits.cc b/components/arc/file_system/file_system_struct_traits.cc
new file mode 100644
index 0000000000000000000000000000000000000000..df97e6bb62192c9bac69b21f55c09bbaba626063
--- /dev/null
+++ b/components/arc/file_system/file_system_struct_traits.cc
@@ -0,0 +1,42 @@
+// Copyright 2017 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 "components/arc/file_system/file_system_struct_traits.h"
+
+#include "base/logging.h"
+#include "components/arc/common/file_system.mojom.h"
+
+namespace mojo {
+
+// static
+arc::mojom::ChangeType
+EnumTraits<arc::mojom::ChangeType, storage::WatcherManager::ChangeType>::
+    ToMojom(storage::WatcherManager::ChangeType type) {
+  switch (type) {
+    case storage::WatcherManager::CHANGED:
+      return arc::mojom::ChangeType::CHANGED;
+    case storage::WatcherManager::DELETED:
+      return arc::mojom::ChangeType::DELETED;
+  }
+  NOTREACHED();
+  return arc::mojom::ChangeType::CHANGED;
+}
+
+// static
+bool EnumTraits<arc::mojom::ChangeType, storage::WatcherManager::ChangeType>::
+    FromMojom(arc::mojom::ChangeType mojom_type,
+              storage::WatcherManager::ChangeType* type) {
+  switch (mojom_type) {
+    case arc::mojom::ChangeType::CHANGED:
+      *type = storage::WatcherManager::CHANGED;
+      return true;
+    case arc::mojom::ChangeType::DELETED:
+      *type = storage::WatcherManager::DELETED;
+      return true;
+  }
+  NOTREACHED();
+  return false;
+}
+
+}  // namespace mojo