Add WOW64 support to the installer registry work items

chrome/installer/util/delete_reg_key_work_item.cc

Index: chrome/installer/util/delete_reg_key_work_item.cc
diff --git a/chrome/installer/util/delete_reg_key_work_item.cc b/chrome/installer/util/delete_reg_key_work_item.cc
index 462698f44bc91ec6b84f446121d60668f291b33b..1f0e62726aeb34e9f429c574cae0fd5e0551d0da 100644
--- a/chrome/installer/util/delete_reg_key_work_item.cc
+++ b/chrome/installer/util/delete_reg_key_work_item.cc
@@ -8,6 +8,7 @@
 
 #include "base/logging.h"
 #include "base/win/registry.h"
+#include "chrome/installer/util/install_util.h"
 
 using base::win::RegKey;
 
@@ -15,12 +16,17 @@ DeleteRegKeyWorkItem::~DeleteRegKeyWorkItem() {
 }
 
 DeleteRegKeyWorkItem::DeleteRegKeyWorkItem(HKEY predefined_root,
-                                           const std::wstring& path)
+                                           const std::wstring& path,
+                                           REGSAM wow64_access)
     : predefined_root_(predefined_root),
-      path_(path) {
+      path_(path),
+      wow64_access_(wow64_access) {
   DCHECK(predefined_root);
   // It's a safe bet that we don't want to delete one of the root trees.
   DCHECK(!path.empty());
+  DCHECK(wow64_access == 0 ||
+         wow64_access == KEY_WOW64_32KEY ||
+         wow64_access == KEY_WOW64_64KEY);
 }
 
 bool DeleteRegKeyWorkItem::Do() {
@@ -31,14 +37,15 @@ bool DeleteRegKeyWorkItem::Do() {
 
   // Only try to make a backup if we're not configured to ignore failures.
   if (!ignore_failure_) {
-    if (!backup.Initialize(predefined_root_, path_.c_str())) {
+    if (!backup.Initialize(predefined_root_, path_.c_str(), wow64_access_)) {
       LOG(ERROR) << "Failed to backup destination for registry key copy.";
       return false;
     }
   }
 
   // Delete the key.
-  LONG result = SHDeleteKey(predefined_root_, path_.c_str());
+  LONG result = InstallUtil::DeleteRegistryKey(
+      predefined_root_, path_.c_str(), wow64_access_);
   if (result != ERROR_SUCCESS && result != ERROR_FILE_NOT_FOUND) {
     LOG(ERROR) << "Failed to delete key at " << path_ << ", result: "
                << result;
@@ -57,7 +64,8 @@ void DeleteRegKeyWorkItem::Rollback() {
 
   // Delete anything in the key before restoring the backup in case someone else
   // put new data in the key after Do().
-  LONG result = SHDeleteKey(predefined_root_, path_.c_str());
+  LONG result = InstallUtil::DeleteRegistryKey(
+      predefined_root_, path_.c_str(), wow64_access_);
   if (result != ERROR_SUCCESS && result != ERROR_FILE_NOT_FOUND) {
     LOG(ERROR) << "Failed to delete key at " << path_ << " in rollback, "
                   "result: " << result;
@@ -65,6 +73,6 @@ void DeleteRegKeyWorkItem::Rollback() {
 
   // Restore the old contents.  The restoration takes on its default security
   // attributes; any custom attributes are lost.
-  if (!backup_.WriteTo(predefined_root_, path_.c_str()))
+  if (!backup_.WriteTo(predefined_root_, path_.c_str(), wow64_access_))
     LOG(ERROR) << "Failed to restore key in rollback.";
 }