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

chrome/installer/mini_installer/mini_installer.cc

Index: chrome/installer/mini_installer/mini_installer.cc
diff --git a/chrome/installer/mini_installer/mini_installer.cc b/chrome/installer/mini_installer/mini_installer.cc
index 25b0c80413049d6618a1e153e5cb0a0460fc4ced..c2ee715bf3e0b10c10db84f4149b5ab704fdc71e 100644
--- a/chrome/installer/mini_installer/mini_installer.cc
+++ b/chrome/installer/mini_installer/mini_installer.cc
@@ -132,7 +132,8 @@ bool ReadValueFromRegistry(HKEY root_key, const wchar_t *sub_key,
                            size_t size) {
   RegKey key;
 
-  if (key.Open(root_key, sub_key, KEY_QUERY_VALUE) == ERROR_SUCCESS &&
+  if (key.Open(root_key, sub_key,
+               KEY_QUERY_VALUE | KEY_WOW64_32KEY) == ERROR_SUCCESS &&

[grt (UTC plus 2), 2014/05/27 16:42:08]

this function is only used for a key in HKCU that isn't affected by WOW64. it
doesn't seem right to put the flag here.

[Will Harris, 2014/05/27 19:25:10]

Done.

       key.ReadValue(value_name, value, size) == ERROR_SUCCESS) {
     return true;
   }
@@ -156,7 +157,7 @@ bool OpenClientStateKey(HKEY root_key, const wchar_t* app_guid, REGSAM access,
 // TODO(grt): Write a unit test for this that uses registry virtualization.
 void SetInstallerFlags(const Configuration& configuration) {
   RegKey key;
-  const REGSAM key_access = KEY_QUERY_VALUE | KEY_SET_VALUE;
+  const REGSAM key_access = KEY_QUERY_VALUE | KEY_SET_VALUE | KEY_WOW64_32KEY;
   const HKEY root_key =
       configuration.is_system_level() ? HKEY_LOCAL_MACHINE : HKEY_CURRENT_USER;
   // This is ignored if multi-install is true.
@@ -229,7 +230,8 @@ bool GetSetupExePathForGuidFromRegistry(bool system_level,
                                         size_t size) {
   const HKEY root_key = system_level ? HKEY_LOCAL_MACHINE : HKEY_CURRENT_USER;
   RegKey key;
-  return OpenClientStateKey(root_key, app_guid, KEY_QUERY_VALUE, &key) &&
+  return OpenClientStateKey(root_key, app_guid,
+                            KEY_QUERY_VALUE | KEY_WOW64_32KEY, &key) &&
       (key.ReadValue(kUninstallRegistryValueName, path, size) == ERROR_SUCCESS);
 }