Changing multiprocess test SpawnChild to return a struct.

content/common/sandbox_mac_diraccess_unittest.mm

Index: content/common/sandbox_mac_diraccess_unittest.mm
diff --git a/content/common/sandbox_mac_diraccess_unittest.mm b/content/common/sandbox_mac_diraccess_unittest.mm
index 828395fc744e2dbe416cb1d3cb0393569dbd2f13..0207ebdad711acf219dd22a9a0ef0dd37963f012 100644
--- a/content/common/sandbox_mac_diraccess_unittest.mm
+++ b/content/common/sandbox_mac_diraccess_unittest.mm
@@ -39,7 +39,8 @@ class MacDirAccessSandboxTest : public base::MultiProcessTest {
  public:
   bool CheckSandbox(const std::string& directory_to_try) {
     setenv(kSandboxAccessPathKey, directory_to_try.c_str(), 1);
-    base::Process child_process = SpawnChild("mac_sandbox_path_access");
+    base::SpawnChildResult spawn_result = SpawnChild("mac_sandbox_path_access");
+    base::Process child_process = std::move(spawn_result.process);
     if (!child_process.IsValid()) {
       LOG(WARNING) << "SpawnChild failed";
       return false;