Make omaha, gcapi and uninstall registry accesses use Wow6432Node on 64-bit

chrome/installer/mini_installer/mini_installer.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // mini_installer.exe is the first exe that is run when chrome is being
 // installed or upgraded. It is designed to be extremely small (~5KB with no
 // extra resources linked) and it has two main jobs:
 //   1) unpack the resources (possibly decompressing some)
 //   2) run the real installer (setup.exe) with appropriate flags.
 //
@@ skipping 127 matching lines @@
   }
   return false;
 }
 
 // Opens the Google Update ClientState key for a product.
 bool OpenClientStateKey(HKEY root_key, const wchar_t* app_guid, REGSAM access,
                         RegKey* key) {
   PathString client_state_key;
   return client_state_key.assign(kApRegistryKeyBase) &&
          client_state_key.append(app_guid) &&
-         (key->Open(root_key, client_state_key.get(), access) == ERROR_SUCCESS);
+         (key->Open(root_key,
+                    client_state_key.get(),
+                    access | KEY_WOW64_32KEY) == ERROR_SUCCESS);
 }
 
 // This function sets the flag in registry to indicate that Google Update
 // should try full installer next time. If the current installer works, this
 // flag is cleared by setup.exe at the end of install. The flag will by default
 // be written to HKCU, but if --system-level is included in the command line,
 // it will be written to HKLM instead.
 // TODO(grt): Write a unit test for this that uses registry virtualization.
 void SetInstallerFlags(const Configuration& configuration) {
   RegKey key;
@@ skipping 676 matching lines @@
 #pragma function(memset)
 void* memset(void* dest, int c, size_t count) {
   void* start = dest;
   while (count--) {
     *reinterpret_cast<char*>(dest) = static_cast<char>(c);
     dest = reinterpret_cast<char*>(dest) + 1;
   }
   return start;
 }
 }  // extern "C"