Changing multiprocess test SpawnChild to return a struct.

base/process/process_metrics_unittest.cc

Index: base/process/process_metrics_unittest.cc
diff --git a/base/process/process_metrics_unittest.cc b/base/process/process_metrics_unittest.cc
index 3e059b48a45f565f0bbe6f12060a19e8ada834f6..3bb85525a49e3feb7ac355d9b8dd68a7f9dd9bc3 100644
--- a/base/process/process_metrics_unittest.cc
+++ b/base/process/process_metrics_unittest.cc
@@ -491,15 +491,15 @@ TEST(ProcessMetricsTest, GetOpenFdCount) {
   const FilePath temp_path = temp_dir.GetPath();
   CommandLine child_command_line(GetMultiProcessTestChildBaseCommandLine());
   child_command_line.AppendSwitchPath(kTempDirFlag, temp_path);
-  Process child = SpawnMultiProcessTestChild(
+  SpawnChildResult spawn_child = SpawnMultiProcessTestChild(
       ChildMainString, child_command_line, LaunchOptions());
-  ASSERT_TRUE(child.IsValid());
+  ASSERT_TRUE(spawn_child.process.IsValid());
   WaitForEvent(temp_path, kSignalClosed);
 
   std::unique_ptr<ProcessMetrics> metrics(
-      ProcessMetrics::CreateProcessMetrics(child.Handle()));
+      ProcessMetrics::CreateProcessMetrics(spawn_child.process.Handle()));
   EXPECT_EQ(0, metrics->GetOpenFdCount());
-  ASSERT_TRUE(child.Terminate(0, true));
+  ASSERT_TRUE(spawn_child.process.Terminate(0, true));
 }
 #endif  // defined(OS_LINUX)