Revert of cheets: implement cros side of WallpaperManagerService.

chrome/browser/chromeos/arc/arc_wallpaper_handler.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 "chrome/browser/chromeos/arc/arc_wallpaper_handler.h"
+
+#include <string>
+#include <utility>
+#include <vector>
+
+#include "base/logging.h"
+#include "base/memory/ptr_util.h"
+#include "chrome/browser/chromeos/login/users/wallpaper/wallpaper_manager.h"
+#include "components/signin/core/account_id/account_id.h"
+#include "components/user_manager/user_manager.h"
+#include "components/wallpaper/wallpaper_files_id.h"
+#include "components/wallpaper/wallpaper_layout.h"
+#include "content/public/browser/browser_thread.h"
+#include "ui/gfx/image/image_skia.h"
+
+using user_manager::UserManager;
+
+namespace arc {
+
+namespace {
+
+constexpr char kAndroidWallpaperFilename[] = "android.jpg";
+
+// Sets a decoded bitmap as the wallpaper.
+void SetBitmapAsWallpaper(const SkBitmap& bitmap) {
+  // Make the SkBitmap immutable as we won't modify it. This is important
+  // because otherwise it gets duplicated during painting, wasting memory.
+  SkBitmap immutable_bitmap(bitmap);
+  immutable_bitmap.setImmutable();
+  gfx::ImageSkia image = gfx::ImageSkia::CreateFrom1xBitmap(immutable_bitmap);
+  image.MakeThreadSafe();
+
+  chromeos::WallpaperManager* wallpaper_manager =
+      chromeos::WallpaperManager::Get();
+
+  const AccountId& account_id =
+      UserManager::Get()->GetPrimaryUser()->GetAccountId();
+  wallpaper::WallpaperFilesId wallpaper_files_id =
+      wallpaper_manager->GetFilesId(account_id);
+  const bool update_wallpaper =
+      account_id == UserManager::Get()->GetActiveUser()->GetAccountId();
+  // TODO(crbug.com/618922): Allow specifying layout.
+  wallpaper_manager->SetCustomWallpaper(
+      account_id, wallpaper_files_id, kAndroidWallpaperFilename,
+      wallpaper::WALLPAPER_LAYOUT_STRETCH, user_manager::User::CUSTOMIZED,
+      image, update_wallpaper);
+
+  // TODO(crbug.com/618922): Register the wallpaper to Chrome OS wallpaper
+  // picker. Currently the new wallpaper does not appear there. The best way to
+  // make this happen seems to do the same things as wallpaper_api.cc and
+  // wallpaper_private_api.cc.
+}
+
+}  // namespace
+
+ArcWallpaperHandler::ArcWallpaperHandler() = default;
+
+ArcWallpaperHandler::~ArcWallpaperHandler() {
+  DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
+  // Make sure the callback is never called after destruction. It is safe to
+  // call Cancel() even when there is no in-flight request.
+  ImageDecoder::Cancel(this);
+}
+
+void ArcWallpaperHandler::SetWallpaper(std::vector<uint8_t> jpeg_data) {
+  DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
+  // If there is an in-flight request, cancel it. It is safe to call Cancel()
+  // even when there is no in-flight request.
+  ImageDecoder::Cancel(this);
+  ImageDecoder::StartWithOptions(this, std::move(jpeg_data),
+                                 ImageDecoder::ROBUST_JPEG_CODEC, true);
+}
+
+void ArcWallpaperHandler::OnImageDecoded(const SkBitmap& bitmap) {
+  DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
+  SetBitmapAsWallpaper(bitmap);
+}
+
+void ArcWallpaperHandler::OnDecodeImageFailed() {
+  DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
+  LOG(ERROR) << "Failed to decode wallpaper image.";
+}
+
+}  // namespace arc