Test ExistingThreadLoader.

content/utility/utility_process_control_impl.cc

Index: content/utility/utility_process_control_impl.cc
diff --git a/content/utility/utility_process_control_impl.cc b/content/utility/utility_process_control_impl.cc
index f717f8687955514df49db1b597ca61ab4e4d3e7d..4cdcc9c02e35c427cd6e063875e5e3a4e8d86107 100644
--- a/content/utility/utility_process_control_impl.cc
+++ b/content/utility/utility_process_control_impl.cc
@@ -5,6 +5,8 @@
 #include "content/utility/utility_process_control_impl.h"
 
 #include "base/bind.h"
+#include "base/thread_task_runner_handle.h"
+#include "content/common/mojo/existing_thread_loader.h"
 #include "content/common/mojo/static_loader.h"
 #include "content/public/common/content_client.h"
 #include "content/public/utility/content_utility_client.h"
@@ -26,7 +28,10 @@ void QuitProcess() {
 
 }  // namespace
 
-UtilityProcessControlImpl::UtilityProcessControlImpl() {}
+UtilityProcessControlImpl::UtilityProcessControlImpl()
+    : test_thread_("TestThread") {
+  test_thread_.Start();
+}
 
 UtilityProcessControlImpl::~UtilityProcessControlImpl() {}
 
@@ -43,8 +48,9 @@ void UtilityProcessControlImpl::RegisterLoaders(
   }
 
 #if defined(ENABLE_MOJO_MEDIA_IN_UTILITY_PROCESS)
-  map_ref["mojo:media"] = new StaticLoader(
-      base::Bind(&media::CreateMojoMediaApplication), base::Bind(&QuitProcess));
+  map_ref["mojo:media"] =
+      new ExistingThreadLoader(base::Bind(&media::CreateMojoMediaApplication),
+                               test_thread_.task_runner());
 #endif
 }