Convert //content from scoped_ptr to std::unique_ptr

content/test/run_all_unittests.cc

Index: content/test/run_all_unittests.cc
diff --git a/content/test/run_all_unittests.cc b/content/test/run_all_unittests.cc
index f0edbd9f003211ccd1265c885b2ea693c2da7517..b254ef83369fab375edc57f20672ae0e9d38f39b 100644
--- a/content/test/run_all_unittests.cc
+++ b/content/test/run_all_unittests.cc
@@ -27,7 +27,7 @@ int main(int argc, char** argv) {
       new content::ContentTestSuite(argc, argv));
   content::InitializeMojo();
   base::TestIOThread test_io_thread(base::TestIOThread::kAutoStart);
-  scoped_ptr<mojo::edk::test::ScopedIPCSupport> ipc_support;
+  std::unique_ptr<mojo::edk::test::ScopedIPCSupport> ipc_support;
   ipc_support.reset(
       new mojo::edk::test::ScopedIPCSupport(test_io_thread.task_runner()));