[Chrome OS] Add a chrome os device wallpaper policy.

chrome/browser/chromeos/settings/device_settings_provider.cc

 // Copyright (c) 2012 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/settings/device_settings_provider.h"
 
 #include <memory.h>
 #include <stddef.h>
 #include <utility>
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/callback.h"
+#include "base/json/json_reader.h"
 #include "base/logging.h"
 #include "base/macros.h"
 #include "base/metrics/histogram_macros.h"
 #include "base/threading/thread_restrictions.h"
 #include "base/values.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/chromeos/ownership/owner_settings_service_chromeos.h"
 #include "chrome/browser/chromeos/policy/browser_policy_connector_chromeos.h"
 #include "chrome/browser/chromeos/policy/device_local_account.h"
 #include "chrome/browser/chromeos/settings/cros_settings.h"
@@ skipping 33 matching lines @@
     kAccountsPrefLoginScreenDomainAutoComplete,
     kAllowBluetooth,
     kAllowRedeemChromeOsRegistrationOffers,
     kAllowedConnectionTypesForUpdate,
     kAttestationForContentProtectionEnabled,
     kDeviceAttestationEnabled,
     kDeviceDisabled,
     kDeviceDisabledMessage,
     kDeviceOwner,
     kDeviceQuirksDownloadEnabled,
+    kDeviceWallpaperImage,
     kDisplayRotationDefault,
     kExtensionCacheSize,
     kHeartbeatEnabled,
     kHeartbeatFrequency,
     kLoginApps,
     kLoginAuthenticationBehavior,
     kLoginVideoCaptureAllowedUrls,
     kPolicyMissingMitigationMode,
     kRebootOnShutdown,
     kReleaseChannel,
@@ skipping 439 matching lines @@
   } else {
     new_values_cache->SetBoolean(kAllowBluetooth, true);
   }
 
   if (policy.has_quirks_download_enabled() &&
       policy.quirks_download_enabled().has_quirks_download_enabled()) {
     new_values_cache->SetBoolean(
         kDeviceQuirksDownloadEnabled,
         policy.quirks_download_enabled().quirks_download_enabled());
   }
+
+  if (policy.has_device_wallpaper_image() &&
+      policy.device_wallpaper_image().has_device_wallpaper_image()) {
+    std::unique_ptr<base::DictionaryValue> dict_val =
+        base::DictionaryValue::From(base::JSONReader::Read(
+            policy.device_wallpaper_image().device_wallpaper_image()));
+    new_values_cache->SetValue(kDeviceWallpaperImage, std::move(dict_val));
+  }
 }
 
 void DecodeLogUploadPolicies(const em::ChromeDeviceSettingsProto& policy,
                              PrefValueMap* new_values_cache) {
   if (!policy.has_device_log_upload_settings())
     return;
 
   const em::DeviceLogUploadSettingsProto& log_upload_policy =
       policy.device_log_upload_settings();
   if (log_upload_policy.has_system_log_upload_enabled()) {
@@ skipping 325 matching lines @@
   // Notify the observers we are done.
   std::vector<base::Closure> callbacks;
   callbacks.swap(callbacks_);
   for (size_t i = 0; i < callbacks.size(); ++i)
     callbacks[i].Run();
 
   return settings_loaded;
 }
 
 }  // namespace chromeos