Changing multiprocess test SpawnChild to return a struct.

sandbox/mac/bootstrap_sandbox_unittest.mm

Index: sandbox/mac/bootstrap_sandbox_unittest.mm
diff --git a/sandbox/mac/bootstrap_sandbox_unittest.mm b/sandbox/mac/bootstrap_sandbox_unittest.mm
index a6225a91c32ab07531624057ddcd96dd9dc17d2a..79732a93cff3aaf4b0734d22dab7fa5e0be3b354 100644
--- a/sandbox/mac/bootstrap_sandbox_unittest.mm
+++ b/sandbox/mac/bootstrap_sandbox_unittest.mm
@@ -104,7 +104,9 @@ class BootstrapSandboxTest : public base::MultiProcessTest {
     base::LaunchOptions options;
     options.pre_exec_delegate = pre_exec_delegate.get();
 
-    base::Process process = SpawnChildWithOptions(child_name, options);
+    base::SpawnChildResult spawn_result =
+        SpawnChildWithOptions(child_name, options);
+    base::Process process = std::move(spawn_result.process);
     ASSERT_TRUE(process.IsValid());
     int code = 0;
     EXPECT_TRUE(process.WaitForExit(&code));
@@ -124,7 +126,8 @@ TEST_F(BootstrapSandboxTest, DistributedNotifications_Unsandboxed) {
   base::scoped_nsobject<DistributedNotificationObserver> observer(
       [[DistributedNotificationObserver alloc] init]);
 
-  base::Process process = SpawnChild(kNotificationTestMain);
+  base::SpawnChildResult spawn_result = SpawnChild(kNotificationTestMain);
+  base::Process process = std::move(spawn_result.process);
   ASSERT_TRUE(process.IsValid());
   int code = 0;
   EXPECT_TRUE(process.WaitForExit(&code));
@@ -471,7 +474,9 @@ TEST_F(BootstrapSandboxTest, ChildOutliveSandbox) {
       sandbox_->NewClient(kTestPolicyId));
   base::LaunchOptions options;
   options.pre_exec_delegate = pre_exec_delegate.get();
-  base::Process process = SpawnChildWithOptions("ChildOutliveSandbox", options);
+  base::SpawnChildResult spawn_result =
+      SpawnChildWithOptions("ChildOutliveSandbox", options);
+  base::Process process = std::move(spawn_result.process);
   ASSERT_TRUE(process.IsValid());
 
   // Synchronize with the child.