Convert UtilityProcessHost to bootstrap Mojo Channel using the Shell connection

chrome/browser/extensions/extension_service_test_base.h

Index: chrome/browser/extensions/extension_service_test_base.h
diff --git a/chrome/browser/extensions/extension_service_test_base.h b/chrome/browser/extensions/extension_service_test_base.h
index 6a83019ac86ebb8c215a1738e9f13cef752a70f6..5f4b2a6d887b8e9d95196b4b14d27b8b0bc429c5 100644
--- a/chrome/browser/extensions/extension_service_test_base.h
+++ b/chrome/browser/extensions/extension_service_test_base.h
@@ -33,6 +33,7 @@ class TestingProfile;
 
 namespace content {
 class BrowserContext;
+class ShellContext;
 }
 
 namespace extensions {
@@ -170,6 +171,8 @@ class ExtensionServiceTestBase : public testing::Test {
   // The associated ExtensionRegistry, for convenience.
   extensions::ExtensionRegistry* registry_;
 
+  std::unique_ptr<content::ShellContext> shell_context_;
+
 #if defined OS_CHROMEOS
   chromeos::ScopedTestDeviceSettingsService test_device_settings_service_;
   chromeos::ScopedTestCrosSettings test_cros_settings_;