Hook up Chrome's wallpaper picker for mash.

ash/sysui/user_wallpaper_delegate_mus.cc

+// 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.
+
+#include "ash/sysui/user_wallpaper_delegate_mus.h"
+
+#include "ash/desktop_background/desktop_background_controller.h"
+#include "ash/shell.h"
+#include "components/wallpaper/wallpaper_layout.h"
+#include "services/shell/public/cpp/connector.h"
+#include "ui/views/mus/window_manager_connection.h"
+#include "ui/wm/core/window_animations.h"
+
+namespace ash {
+namespace sysui {
+
+UserWallpaperDelegateMus::UserWallpaperDelegateMus() {}
+
+UserWallpaperDelegateMus::~UserWallpaperDelegateMus() {}
+
+int UserWallpaperDelegateMus::GetAnimationType() {
+  return ::wm::WINDOW_VISIBILITY_ANIMATION_TYPE_FADE;
+}
+
+int UserWallpaperDelegateMus::GetAnimationDurationOverride() {
+  return 0;
+}
+
+void UserWallpaperDelegateMus::SetAnimationDurationOverride(
+    int animation_duration_in_ms) {
+  NOTIMPLEMENTED();
+}
+
+bool UserWallpaperDelegateMus::ShouldShowInitialAnimation() {
+  return false;
+}
+
+void UserWallpaperDelegateMus::UpdateWallpaper(bool clear_cache) {
+  NOTIMPLEMENTED();
+}
+
+void UserWallpaperDelegateMus::InitializeWallpaper() {
+  // No action required; ChromeBrowserMainPartsChromeos inits WallpaperManager.
+}
+
+void UserWallpaperDelegateMus::OpenSetWallpaperPage() {
+  mojom::WallpaperManagerPtr wallpaper_manager;
+  auto* connector = views::WindowManagerConnection::Get()->connector();
+  connector->ConnectToInterface("exe:chrome", &wallpaper_manager);
+  wallpaper_manager->Open();
+}
+
+bool UserWallpaperDelegateMus::CanOpenSetWallpaperPage() {
+  // TODO(msw): Restrict this during login, etc.
+  return true;
+}
+
+void UserWallpaperDelegateMus::OnWallpaperAnimationFinished() {}
+
+void UserWallpaperDelegateMus::OnWallpaperBootAnimationFinished() {}
+
+void UserWallpaperDelegateMus::SetWallpaper(const SkBitmap& wallpaper,
+                                            mojom::WallpaperLayout layout) {
+  if (wallpaper.isNull())
+    return;
+  gfx::ImageSkia image = gfx::ImageSkia::CreateFrom1xBitmap(wallpaper);
+  Shell::GetInstance()->desktop_background_controller()->SetWallpaperImage(
+      image, static_cast<wallpaper::WallpaperLayout>(layout));

[dcheng, 2016/06/02 21:36:51]

=/

What guarantees that the enums line up?

[msw, 2016/06/02 22:19:15]

I added explicit conversion functions.

+}
+
+}  // namespace sysui
+}  // namespace ash