Convert UtilityProcessHost to bootstrap Mojo Channel using the Shell connection

chrome/browser/extensions/updater/extension_updater_unittest.cc

Index: chrome/browser/extensions/updater/extension_updater_unittest.cc
diff --git a/chrome/browser/extensions/updater/extension_updater_unittest.cc b/chrome/browser/extensions/updater/extension_updater_unittest.cc
index 60c10a664286c43e2951bd676ed1f9bac56576d8..783259d4f0e2101099f5d4109272b344f302f083 100644
--- a/chrome/browser/extensions/updater/extension_updater_unittest.cc
+++ b/chrome/browser/extensions/updater/extension_updater_unittest.cc
@@ -52,6 +52,7 @@
 #include "content/public/browser/notification_registrar.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/extension_prefs.h"
@@ -649,6 +650,7 @@ class ExtensionUpdaterTest : public testing::Test {
   }
 
   void SetUp() override {
+    shell_context_ = content::ShellContext::Create();
     prefs_.reset(new TestExtensionPrefs(base::ThreadTaskRunnerHandle::Get()));
   }
 
@@ -1896,6 +1898,7 @@ class ExtensionUpdaterTest : public testing::Test {
   content::TestBrowserThreadBundle thread_bundle_;
   content::InProcessUtilityThreadHelper in_process_utility_thread_helper_;
   ScopedTestingLocalState testing_local_state_;
+  std::unique_ptr<content::ShellContext> shell_context_;
 
 #if defined OS_CHROMEOS
   chromeos::ScopedTestDeviceSettingsService test_device_settings_service_;