Always allow ServiceRegistry to be used with UtilityProcessHosts.

chrome/test/base/run_all_unittests.cc

Index: chrome/test/base/run_all_unittests.cc
diff --git a/chrome/test/base/run_all_unittests.cc b/chrome/test/base/run_all_unittests.cc
index 60f2d3a8ed9fbe89715e41daa6504717bed834dc..fd8928d4023a1b69411a536f9bb65241bcd5b5ff 100644
--- a/chrome/test/base/run_all_unittests.cc
+++ b/chrome/test/base/run_all_unittests.cc
@@ -5,14 +5,19 @@
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/test/launcher/unit_test_launcher.h"
+#include "base/test/test_io_thread.h"
 #include "chrome/test/base/chrome_unit_test_suite.h"
 #include "content/public/test/unittest_test_suite.h"
 #include "mojo/edk/embedder/embedder.h"
+#include "mojo/edk/test/scoped_ipc_support.h"
 
 int main(int argc, char **argv) {
   content::UnitTestTestSuite test_suite(new ChromeUnitTestSuite(argc, argv));
 
   mojo::edk::Init();
+  base::TestIOThread test_io_thread(base::TestIOThread::kAutoStart);
+  mojo::edk::test::ScopedIPCSupport ipc_support(test_io_thread.task_runner());
+
   return base::LaunchUnitTests(
       argc, argv, base::Bind(&content::UnitTestTestSuite::Run,
                              base::Unretained(&test_suite)));