Add WOW64 support to the installer registry work items

chrome/test/mini_installer_test/installer_test_util.cc

Index: chrome/test/mini_installer_test/installer_test_util.cc
diff --git a/chrome/test/mini_installer_test/installer_test_util.cc b/chrome/test/mini_installer_test/installer_test_util.cc
index 76d1f97571eccc3eb6044326f91f99ce91e1e452..e9c6a8c7a88fe88c1b4b53ccba85b7b068a2d0bc 100644
--- a/chrome/test/mini_installer_test/installer_test_util.cc
+++ b/chrome/test/mini_installer_test/installer_test_util.cc
@@ -65,14 +65,16 @@ bool DeleteInstallDirectory(bool system_level,
 }
 
 bool DeleteRegistryKey(bool system_level,
-                       InstallationValidator::InstallationType type) {
+                       InstallationValidator::InstallationType type,
+                       REGSAM wow64_access) {
   BrowserDistribution* dist = BrowserDistribution::GetSpecificDistribution(
       ToBrowserDistributionType(type));
   base::FilePath::StringType key(google_update::kRegPathClients);
   key.push_back(base::FilePath::kSeparators[0]);
   key.append(dist->GetAppGuid());
   HKEY root = system_level ? HKEY_LOCAL_MACHINE : HKEY_CURRENT_USER;
-  return InstallUtil::DeleteRegistryKey(root, key);
+  LONG result = InstallUtil::DeleteRegistryKey(root, key, wow64_access);
+  return (result == ERROR_SUCCESS || result == ERROR_FILE_NOT_FOUND);
 }
 
 bool GetChromeInstallDirectory(bool system_level, base::FilePath* path) {
@@ -296,4 +298,4 @@ bool RunAndWaitForCommandToFinish(CommandLine command) {
   return true;
 }
 
-}  // namespace
+}  // namespace installer_test