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

base/win/registry.cc

Index: base/win/registry.cc
diff --git a/base/win/registry.cc b/base/win/registry.cc
index a6cb9ae89f789a78461e7d611374e603f492b724..51a1466f22818ff2cf491ce2e1c9b6451f69131e 100644
--- a/base/win/registry.cc
+++ b/base/win/registry.cc
@@ -487,10 +487,13 @@ LONG RegKey::RegDelRecurse(HKEY root_key,
 // RegistryValueIterator ------------------------------------------------------
 
 RegistryValueIterator::RegistryValueIterator(HKEY root_key,
-                                             const wchar_t* folder_key)
+                                             const wchar_t* folder_key,
+                                             REGSAM wow64access)
     : name_(MAX_PATH, L'\0'),
       value_(MAX_PATH, L'\0') {
-  LONG result = RegOpenKeyEx(root_key, folder_key, 0, KEY_READ, &key_);
+  DCHECK(!wow64access || wow64access & kWow64AccessMask);
+  LONG result =
+      RegOpenKeyEx(root_key, folder_key, 0, KEY_READ | wow64access, &key_);
   if (result != ERROR_SUCCESS) {
     key_ = NULL;
   } else {
@@ -576,8 +579,11 @@ bool RegistryValueIterator::Read() {
 // RegistryKeyIterator --------------------------------------------------------
 
 RegistryKeyIterator::RegistryKeyIterator(HKEY root_key,
-                                         const wchar_t* folder_key) {
-  LONG result = RegOpenKeyEx(root_key, folder_key, 0, KEY_READ, &key_);
+                                         const wchar_t* folder_key,
+                                         REGSAM wow64access) {
+  DCHECK(!wow64access || wow64access & kWow64AccessMask);
+  LONG result =
+      RegOpenKeyEx(root_key, folder_key, 0, KEY_READ | wow64access, &key_);
   if (result != ERROR_SUCCESS) {
     key_ = NULL;
   } else {