Update installer to use the new version of LaunchProcess.

chrome/installer/setup/setup_util_unittest.cc

Index: chrome/installer/setup/setup_util_unittest.cc
diff --git a/chrome/installer/setup/setup_util_unittest.cc b/chrome/installer/setup/setup_util_unittest.cc
index 9b92429ca64b9125a5baf4b9acde2ecbe5ca5534..6c3430c295b68f444737cb72661dcfac18859d5c 100644
--- a/chrome/installer/setup/setup_util_unittest.cc
+++ b/chrome/installer/setup/setup_util_unittest.cc
@@ -229,12 +229,11 @@ ScopedPriorityClass::~ScopedPriorityClass() {
 PriorityClassChangeResult RelaunchAndDoProcessPriorityAdjustment() {
   CommandLine cmd_line(*CommandLine::ForCurrentProcess());
   cmd_line.AppendSwitch(kAdjustProcessPriority);
-  base::ProcessHandle process_handle = NULL;
+  base::Process process = base::LaunchProcess(cmd_line, base::LaunchOptions());
   int exit_code = 0;
-  if (!base::LaunchProcess(cmd_line, base::LaunchOptions(),
-                           &process_handle)) {
+  if (!process.IsValid()) {
     ADD_FAILURE() << " to launch subprocess.";
-  } else if (!base::WaitForExitCode(process_handle, &exit_code)) {
+  } else if (!process.WaitForExit(&exit_code)) {
     ADD_FAILURE() << " to wait for subprocess to exit.";
   } else {
     return static_cast<PriorityClassChangeResult>(exit_code);