Upgrade the windows specific version of LaunchProcess to avoid raw handles.

chrome/installer/test/alternate_version_generator.cc

Index: chrome/installer/test/alternate_version_generator.cc
diff --git a/chrome/installer/test/alternate_version_generator.cc b/chrome/installer/test/alternate_version_generator.cc
index 0d505c844be9bf7868d9b9e5b16e05a892f3d402..fd66c012f153e5082dd6938d2f013810d4a2f347 100644
--- a/chrome/installer/test/alternate_version_generator.cc
+++ b/chrome/installer/test/alternate_version_generator.cc
@@ -214,13 +214,13 @@ bool MappedFile::Initialize(base::File file) {
 bool RunProcessAndWait(const wchar_t* exe_path, const std::wstring& cmdline,
                        int* exit_code) {
   bool result = true;
-  base::win::ScopedHandle process;
   base::LaunchOptions options;
   options.wait = true;
   options.start_hidden = true;
-  if (base::LaunchProcess(cmdline, options, &process)) {
+  base::Process process = base::LaunchProcess(cmdline, options);
+  if (process.IsValid()) {
     if (exit_code) {
-      if (!GetExitCodeProcess(process.Get(),
+      if (!GetExitCodeProcess(process.Handle(),
                               reinterpret_cast<DWORD*>(exit_code))) {
         PLOG(DFATAL) << "Failed getting the exit code for \""
                      << cmdline << "\".";