Convert UtilityProcessHost to bootstrap Mojo Channel using the Shell connection

chrome/browser/safe_browsing/download_protection_service_unittest.cc

Index: chrome/browser/safe_browsing/download_protection_service_unittest.cc
diff --git a/chrome/browser/safe_browsing/download_protection_service_unittest.cc b/chrome/browser/safe_browsing/download_protection_service_unittest.cc
index 07405934e73cb365732d2ef9ed72316ab0d14dd9..57ee268f1dd98facf91febe9bf8f4c1b201b331a 100644
--- a/chrome/browser/safe_browsing/download_protection_service_unittest.cc
+++ b/chrome/browser/safe_browsing/download_protection_service_unittest.cc
@@ -46,6 +46,7 @@
 #include "components/safe_browsing_db/test_database_manager.h"
 #include "content/public/browser/download_danger_type.h"
 #include "content/public/browser/page_navigator.h"
+#include "content/public/browser/shell_context.h"
 #include "content/public/test/mock_download_item.h"
 #include "content/public/test/test_browser_thread_bundle.h"
 #include "content/public/test/test_utils.h"
@@ -244,6 +245,7 @@ class DownloadProtectionServiceTest : public testing::Test {
             content::TestBrowserThreadBundle::IO_MAINLOOP) {
   }
   void SetUp() override {
+    shell_context_ = content::ShellContext::Create();
     // Start real threads for the IO and File threads so that the DCHECKs
     // to test that we're on the correct thread work.
     sb_service_ = new StrictMock<FakeSafeBrowsingService>();
@@ -531,6 +533,7 @@ class DownloadProtectionServiceTest : public testing::Test {
   bool has_result_;
   content::TestBrowserThreadBundle test_browser_thread_bundle_;
   content::InProcessUtilityThreadHelper in_process_utility_thread_helper_;
+  std::unique_ptr<content::ShellContext> shell_context_;
   base::FilePath testdata_path_;
   DownloadProtectionService::ClientDownloadRequestSubscription
       client_download_request_subscription_;