Allow Registry Iterator functions to use a specified WOW64 mode when iterating.

chrome/installer/util/app_commands.h

Index: chrome/installer/util/app_commands.h
diff --git a/chrome/installer/util/app_commands.h b/chrome/installer/util/app_commands.h
index f67093d31de6f5dcabe5261a29a2d85543936007..61ea14e3854731a799d884618c44514859620a34 100644
--- a/chrome/installer/util/app_commands.h
+++ b/chrome/installer/util/app_commands.h
@@ -36,7 +36,9 @@ class AppCommands {
   // (typically the "Commands" subkey of a BrowserDistribution's "version key").
   // |key| must have been opened with at least
   // KEY_ENUMERATE_SUB_KEYS | KEY_QUERY_VALUE access rights.
-  bool Initialize(const base::win::RegKey& key);
+  // |wow64access| must be one of 0, KEY_WOW64_32KEY or KEY_WOW64_64KEY and
+  // must match the original WOW64 access used to open |key| previously.
+  bool Initialize(const base::win::RegKey& key, REGSAM wow64access);
 
   // Replaces the contents of this object with that of |other|.
   AppCommands& CopyFrom(const AppCommands& other);