Add WOW64 support to the installer registry work items

chrome/installer/util/work_item.h

Index: chrome/installer/util/work_item.h
diff --git a/chrome/installer/util/work_item.h b/chrome/installer/util/work_item.h
index 30118609f6a48c68ecc822386939133c0e27a49c..148eeafe59e7ab849b0d178060fac89440f038fa 100644
--- a/chrome/installer/util/work_item.h
+++ b/chrome/installer/util/work_item.h
@@ -53,6 +53,12 @@ class WorkItem {
     CHECK_DUPLICATES  // Only move if the move target is different.
   };
 
+  enum RegWow64ViewOption {
+    WOW64_DEFAULT,  // Use default view for specified key.
+    WOW64_64KEY,  // Always attempt to access the 64-bit registry view.
+    WOW64_32KEY  // Always attempt to access the 32-bit registry view.
+  };
+
   // Abstract base class for the conditions used by ConditionWorkItemList.
   // TODO(robertshield): Move this out of WorkItem.
   class Condition {
@@ -72,7 +78,8 @@ class WorkItem {
       HKEY predefined_root,
       const std::wstring& source_key_path,
       const std::wstring& dest_key_path,
-      CopyOverWriteOption overwrite_option);
+      CopyOverWriteOption overwrite_option,
+      RegWow64ViewOption reg_wow64_option);
 
   // Create a CopyTreeWorkItem that recursively copies a file system hierarchy
   // from source path to destination path.
@@ -93,18 +100,22 @@ class WorkItem {
   // Create a CreateRegKeyWorkItem that creates a registry key at the given
   // path.
   static CreateRegKeyWorkItem* CreateCreateRegKeyWorkItem(
-      HKEY predefined_root, const std::wstring& path);
+      HKEY predefined_root, const std::wstring& path,
+      RegWow64ViewOption reg_wow64_option);
 
   // Create a DeleteRegKeyWorkItem that deletes a registry key at the given
   // path.
   static DeleteRegKeyWorkItem* CreateDeleteRegKeyWorkItem(
-      HKEY predefined_root, const std::wstring& path);
+      HKEY predefined_root,
+      const std::wstring& path,
+      RegWow64ViewOption reg_wow64_option);
 
   // Create a DeleteRegValueWorkItem that deletes a registry value
   static DeleteRegValueWorkItem* CreateDeleteRegValueWorkItem(
       HKEY predefined_root,
       const std::wstring& key_path,
-      const std::wstring& value_name);
+      const std::wstring& value_name,
+      RegWow64ViewOption reg_wow64_option);
 
   // Create a DeleteTreeWorkItem that recursively deletes a file system
   // hierarchy at the given root path. A key file can be optionally specified
@@ -129,7 +140,8 @@ class WorkItem {
       const std::wstring& key_path,
       const std::wstring& value_name,
       const std::wstring& value_data,
-      bool overwrite);
+      bool overwrite,
+      RegWow64ViewOption reg_wow64_option);
 
   // Create a SetRegValueWorkItem that sets a registry value with REG_DWORD type
   // at the key with specified path.
@@ -137,7 +149,8 @@ class WorkItem {
       HKEY predefined_root,
       const std::wstring& key_path,
       const std::wstring& value_name,
-      DWORD value_data, bool overwrite);
+      DWORD value_data, bool overwrite,
+      RegWow64ViewOption reg_wow64_option);
 
   // Create a SetRegValueWorkItem that sets a registry value with REG_QWORD type
   // at the key with specified path.
@@ -145,7 +158,8 @@ class WorkItem {
       HKEY predefined_root,
       const std::wstring& key_path,
       const std::wstring& value_name,
-      int64 value_data, bool overwrite);
+      int64 value_data, bool overwrite,
+      RegWow64ViewOption reg_wow64_option);
 
   // Add a SelfRegWorkItem that registers or unregisters a DLL at the
   // specified path.