Add DeviceADPolicyManager to provide AD policy.

chrome/browser/chromeos/login/users/avatar/user_image_manager_browsertest.cc

Index: chrome/browser/chromeos/login/users/avatar/user_image_manager_browsertest.cc
diff --git a/chrome/browser/chromeos/login/users/avatar/user_image_manager_browsertest.cc b/chrome/browser/chromeos/login/users/avatar/user_image_manager_browsertest.cc
index 5afe3b38dc5fa191c3f5473141163e9eaaee0717..02b3fd5bc1f469ce881dd157b869044db15a96ed 100644
--- a/chrome/browser/chromeos/login/users/avatar/user_image_manager_browsertest.cc
+++ b/chrome/browser/chromeos/login/users/avatar/user_image_manager_browsertest.cc
@@ -35,10 +35,12 @@
 #include "chrome/browser/chromeos/login/users/default_user_image/default_user_images.h"
 #include "chrome/browser/chromeos/login/users/mock_user_manager.h"
 #include "chrome/browser/chromeos/login/users/scoped_user_manager_enabler.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/profiles/profile_downloader.h"
 #include "chrome/browser/signin/account_tracker_service_factory.h"
@@ -112,6 +114,13 @@ class UserImageManagerTest : public LoginManagerTest,
 
   // LoginManagerTest overrides:
   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());
+
     LoginManagerTest::SetUpInProcessBrowserTestFixture();
 
     ASSERT_TRUE(PathService::Get(chrome::DIR_TEST_DATA, &test_data_dir_));