Convert UtilityProcessHost to bootstrap Mojo Channel using the Shell connection

extensions/browser/sandboxed_unpacker_unittest.cc

Index: extensions/browser/sandboxed_unpacker_unittest.cc
diff --git a/extensions/browser/sandboxed_unpacker_unittest.cc b/extensions/browser/sandboxed_unpacker_unittest.cc
index 0e3bf9e7a33a132937e60b394017851808e4a0c9..6677b5dace3997cc68ccfdd8b04565ec24fcf291 100644
--- a/extensions/browser/sandboxed_unpacker_unittest.cc
+++ b/extensions/browser/sandboxed_unpacker_unittest.cc
@@ -13,6 +13,8 @@
 #include "base/threading/thread_task_runner_handle.h"
 #include "base/values.h"
 #include "components/crx_file/id_util.h"
+#include "content/public/browser/shell_context.h"
+#include "content/public/common/content_client.h"
 #include "content/public/test/test_browser_thread_bundle.h"
 #include "content/public/test/test_utils.h"
 #include "extensions/browser/extensions_test.h"
@@ -73,6 +75,8 @@ class SandboxedUnpackerTest : public ExtensionsTest {
     // It will delete itself.
     client_ = new MockSandboxedUnpackerClient;
 
+    shell_context_ = content::ShellContext::Create();
+
     sandboxed_unpacker_ = new SandboxedUnpacker(
         Manifest::INTERNAL, Extension::NO_FLAGS, extensions_dir_.path(),
         base::ThreadTaskRunnerHandle::Get(), client_);
@@ -134,6 +138,7 @@ class SandboxedUnpackerTest : public ExtensionsTest {
   std::unique_ptr<content::TestBrowserThreadBundle> browser_threads_;
   std::unique_ptr<content::InProcessUtilityThreadHelper>
       in_process_utility_thread_helper_;
+  std::unique_ptr<content::ShellContext> shell_context_;
 };
 
 TEST_F(SandboxedUnpackerTest, NoCatalogsSuccess) {