win: Make reading NT_IMAGE_HEADERS work cross-bitness

util/win/process_info_test.cc

Index: util/win/process_info_test.cc
diff --git a/util/win/process_info_test.cc b/util/win/process_info_test.cc
index de1d5295943135b66e3c384965d74a34d5a411f8..00b5606022457fad436dfe3a08e9e5f89369b4bb 100644
--- a/util/win/process_info_test.cc
+++ b/util/win/process_info_test.cc
@@ -22,6 +22,7 @@
 #include "build/build_config.h"
 #include "gtest/gtest.h"
 #include "test/paths.h"
+#include "test/win/child_launcher.h"
 #include "util/file/file_io.h"
 #include "util/misc/uuid.h"
 #include "util/win/scoped_handle.h"
@@ -128,30 +129,15 @@ void TestOtherProcess(const base::string16& directory_modification) {
                   L"_process_info_test_child.exe")
           .value();
   // TODO(scottmg): Command line escaping utility.
-  std::wstring command_line = child_test_executable + L" " +
-                              started_uuid.ToString16() + L" " +
-                              done_uuid.ToString16();
-  STARTUPINFO startup_info = {0};
-  startup_info.cb = sizeof(startup_info);
-  PROCESS_INFORMATION process_information;
-  ASSERT_TRUE(CreateProcess(child_test_executable.c_str(),
-                            &command_line[0],
-                            nullptr,
-                            nullptr,
-                            false,
-                            0,
-                            nullptr,
-                            nullptr,
-                            &startup_info,
-                            &process_information));
-  // Take ownership of the two process handles returned.
-  ScopedKernelHANDLE process_main_thread_handle(process_information.hThread);
-  ScopedKernelHANDLE process_handle(process_information.hProcess);
+  ChildLauncher child(
+      child_test_executable,
+      started_uuid.ToString16() + L" " + done_uuid.ToString16());
+  child.Start();
 
   // Wait until the test has completed initialization.
   ASSERT_EQ(WaitForSingleObject(started.get(), INFINITE), WAIT_OBJECT_0);
 
-  ASSERT_TRUE(process_info.Initialize(process_information.hProcess));
+  ASSERT_TRUE(process_info.Initialize(child.process_handle()));
 
   // Tell the test it's OK to shut down now that we've read our data.
   SetEvent(done.get());