Cleanup mojo Wallpaper interfaces for mash.

ash/public/interfaces/wallpaper_enum_traits.h

+// 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.
+
+#ifndef ASH_PUBLIC_INTERFACES_WALLPAPER_ENUM_TRAITS_H_
+#define ASH_PUBLIC_INTERFACES_WALLPAPER_ENUM_TRAITS_H_
+
+#include "ash/public/interfaces/wallpaper.mojom.h"
+#include "components/wallpaper/wallpaper_layout.h"
+
+namespace mojo {
+
+template <>
+struct EnumTraits<ash::mojom::WallpaperLayout, wallpaper::WallpaperLayout> {
+  static ash::mojom::WallpaperLayout ToMojom(wallpaper::WallpaperLayout input) {
+    switch (input) {
+      case wallpaper::WALLPAPER_LAYOUT_CENTER:
+        return ash::mojom::WallpaperLayout::CENTER;
+      case wallpaper::WALLPAPER_LAYOUT_CENTER_CROPPED:
+        return ash::mojom::WallpaperLayout::CENTER_CROPPED;
+      case wallpaper::WALLPAPER_LAYOUT_STRETCH:
+        return ash::mojom::WallpaperLayout::STRETCH;
+      case wallpaper::WALLPAPER_LAYOUT_TILE:
+        return ash::mojom::WallpaperLayout::TILE;
+      case wallpaper::NUM_WALLPAPER_LAYOUT:
+        break;
+    }
+    NOTREACHED();
+    return ash::mojom::WallpaperLayout::CENTER;
+  }
+
+  static bool FromMojom(ash::mojom::WallpaperLayout input,
+                        wallpaper::WallpaperLayout* out) {
+    switch (input) {
+      case ash::mojom::WallpaperLayout::CENTER:
+        *out = wallpaper::WALLPAPER_LAYOUT_CENTER;
+        return true;
+      case ash::mojom::WallpaperLayout::CENTER_CROPPED:
+        *out = wallpaper::WALLPAPER_LAYOUT_CENTER_CROPPED;
+        return true;
+      case ash::mojom::WallpaperLayout::STRETCH:
+        *out = wallpaper::WALLPAPER_LAYOUT_STRETCH;
+        return true;
+      case ash::mojom::WallpaperLayout::TILE:
+        *out = wallpaper::WALLPAPER_LAYOUT_TILE;
+        return true;
+    }
+    NOTREACHED();
+    return false;
+  }
+};
+
+}  // namespace mojo
+
+#endif  // ASH_PUBLIC_INTERFACES_WALLPAPER_ENUM_TRAITS_H_