Change PolicyLoaderWin to load PReg files if possible.

chrome_frame/chrome_launcher.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.
 
 #include "chrome_frame/chrome_launcher.h"
 
 #include <windows.h>
 #include <shellapi.h>
 #include <shlwapi.h>
 
@@ skipping 146 matching lines @@
 
   // Used for basic checks since CreateProcess doesn't support command lines
   // longer than 0x8000 characters. If we surpass that length, we do not add the
   // additional parameters.  Because we need to add a space before the
   // extra parameters, we use 0x7fff and not 0x8000.
   const size_t kMaxChars = 0x7FFF - command_line->size();
   HKEY key;
   LONG result;
   bool found = false;
   for (int i = 0; !found && i < arraysize(kRootKeys); ++i) {
-    result = ::RegOpenKeyExW(kRootKeys[i], policy::kRegistryMandatorySubKey, 0,
+    result = ::RegOpenKeyExW(kRootKeys[i], policy::kRegistryChromePolicyKey, 0,
                              KEY_QUERY_VALUE, &key);
     if (result == ERROR_SUCCESS) {
       DWORD size = 0;
       DWORD type = 0;
       result = RegQueryValueExW(key, launch_params_value_name.c_str(),
                                 0, &type, NULL, &size);
       if (result == ERROR_SUCCESS && type == REG_SZ && size > 0 &&
           (size / sizeof(wchar_t)) < kMaxChars) {
         // This size includes any terminating null character or characters
         // unless the data was stored without them, so for safety we allocate
@@ skipping 81 matching lines @@
     if (PathFileExists(cur_path)) {
       *chrome_path = cur_path;
       success = true;
     }
   }
 
   return success;
 }
 
 }  // namespace chrome_launcher