Convert UtilityProcessHost to bootstrap Mojo Channel using the Shell connection

chrome/browser/chromeos/extensions/device_local_account_external_policy_loader_unittest.cc

Index: chrome/browser/chromeos/extensions/device_local_account_external_policy_loader_unittest.cc
diff --git a/chrome/browser/chromeos/extensions/device_local_account_external_policy_loader_unittest.cc b/chrome/browser/chromeos/extensions/device_local_account_external_policy_loader_unittest.cc
index 202d2cea8b4ed2643fd44b9b7f4cf1d6067056b4..62e70931efab459d203aa63f40e8e60d7f356371 100644
--- a/chrome/browser/chromeos/extensions/device_local_account_external_policy_loader_unittest.cc
+++ b/chrome/browser/chromeos/extensions/device_local_account_external_policy_loader_unittest.cc
@@ -27,6 +27,7 @@
 #include "components/policy/core/common/policy_types.h"
 #include "content/public/browser/notification_service.h"
 #include "content/public/browser/notification_source.h"
+#include "content/public/browser/shell_context.h"
 #include "content/public/test/test_browser_thread_bundle.h"
 #include "content/public/test/test_utils.h"
 #include "extensions/browser/external_install_info.h"
@@ -112,6 +113,7 @@ class DeviceLocalAccountExternalPolicyLoaderTest : public testing::Test {
   void SetForceInstallListPolicy();
 
   content::TestBrowserThreadBundle thread_bundle_;
+  std::unique_ptr<content::ShellContext> shell_context_;
   base::ScopedTempDir temp_dir_;
   base::FilePath cache_dir_;
   policy::MockCloudPolicyStore store_;
@@ -140,6 +142,7 @@ DeviceLocalAccountExternalPolicyLoaderTest::
 }
 
 void DeviceLocalAccountExternalPolicyLoaderTest::SetUp() {
+  shell_context_ = content::ShellContext::Create();
   ASSERT_TRUE(temp_dir_.CreateUniqueTempDir());
   cache_dir_ = temp_dir_.path().Append(kCacheDir);
   ASSERT_TRUE(base::CreateDirectoryAndGetError(cache_dir_, NULL));