Remove the MultiProcessTest::SpawnChild() that as an fds_to_map argument.

base/process/process_util_unittest.cc

Index: base/process/process_util_unittest.cc
diff --git a/base/process/process_util_unittest.cc b/base/process/process_util_unittest.cc
index 23d5181d5a48311089d528d12b55a694e73f9f9e..f45efc973c10697af581c3b6061c7b8b8be5f04a 100644
--- a/base/process/process_util_unittest.cc
+++ b/base/process/process_util_unittest.cc
@@ -505,8 +505,10 @@ int ProcessUtilTest::CountOpenFDsInChild() {
 
   base::FileHandleMappingVector fd_mapping_vec;
   fd_mapping_vec.push_back(std::pair<int, int>(fds[1], kChildPipe));
-  base::ProcessHandle handle = this->SpawnChild(
-      "ProcessUtilsLeakFDChildProcess", fd_mapping_vec, false);
+  base::LaunchOptions options;
+  options.fds_to_remap = &fd_mapping_vec;
+  base::ProcessHandle handle = this->SpawnChildWithOptions(
+      "ProcessUtilsLeakFDChildProcess", options, false);
   CHECK(handle);
   int ret = IGNORE_EINTR(close(fds[1]));
   DPCHECK(ret == 0);