Add DeviceADPolicyManager to provide AD policy.

chrome/browser/chromeos/login/users/wallpaper/wallpaper_manager_policy_browsertest.cc

Index: chrome/browser/chromeos/login/users/wallpaper/wallpaper_manager_policy_browsertest.cc
diff --git a/chrome/browser/chromeos/login/users/wallpaper/wallpaper_manager_policy_browsertest.cc b/chrome/browser/chromeos/login/users/wallpaper/wallpaper_manager_policy_browsertest.cc
index 661d30dbb71bb755a249300b943d939be638dbbd..0afe0d3911b380c7e38c05b4761f15cdbc4aa5a5 100644
--- a/chrome/browser/chromeos/login/users/wallpaper/wallpaper_manager_policy_browsertest.cc
+++ b/chrome/browser/chromeos/login/users/wallpaper/wallpaper_manager_policy_browsertest.cc
@@ -23,10 +23,12 @@
 #include "chrome/browser/chromeos/login/startup_utils.h"
 #include "chrome/browser/chromeos/login/ui/login_display_host.h"
 #include "chrome/browser/chromeos/login/users/wallpaper/wallpaper_manager.h"
+#include "chrome/browser/chromeos/policy/browser_policy_connector_chromeos.h"
 #include "chrome/browser/chromeos/policy/cloud_external_data_manager_base_test_util.h"
 #include "chrome/browser/chromeos/policy/user_cloud_policy_manager_chromeos.h"
 #include "chrome/browser/chromeos/policy/user_cloud_policy_manager_factory_chromeos.h"
 #include "chrome/browser/chromeos/profiles/profile_helper.h"
+#include "chrome/browser/chromeos/settings/stub_install_attributes.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/ui/webui/chromeos/login/oobe_ui.h"
 #include "chrome/common/chrome_paths.h"
@@ -175,6 +177,13 @@ class WallpaperManagerPolicyTest : public LoginManagerTest,
 
   // LoginManagerTest:
   void SetUpInProcessBrowserTestFixture() override {
+    // Set up fake install attributes.
+    std::unique_ptr<chromeos::StubInstallAttributes> attributes =
+        base::MakeUnique<chromeos::StubInstallAttributes>();
+    attributes->SetEnterprise("fake-domain", "fake-id");
+    policy::BrowserPolicyConnectorChromeOS::SetInstallAttributesForTesting(
+        attributes.release());
+
     DBusThreadManager::GetSetterForTesting()->SetSessionManagerClient(
         std::unique_ptr<SessionManagerClient>(fake_session_manager_client_));
 
@@ -410,6 +419,7 @@ IN_PROC_BROWSER_TEST_F(WallpaperManagerPolicyTest, PRE_PersistOverLogout) {
   // Run until wallpaper has changed.
   RunUntilWallpaperChangeCount(2);
   ASSERT_EQ(kRedImageColor, GetAverageWallpaperColor());
+  StartupUtils::MarkOobeCompleted();
 }
 
 IN_PROC_BROWSER_TEST_F(WallpaperManagerPolicyTest, PersistOverLogout) {