[sync] Add hooks to allow for testing sync credential caching in the presence of strange singleton …

chrome/common/chrome_paths_win.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/common/chrome_paths_internal.h"
 
 #include <windows.h>
 #include <knownfolders.h>
 #include <shellapi.h>
 #include <shlobj.h>
 #include <shobjidl.h>
 
+#include "base/command_line.h"
 #include "base/file_path.h"
 #include "base/path_service.h"
 #include "base/win/metro.h"
 #include "base/win/scoped_co_mem.h"
 #include "chrome/common/chrome_constants.h"
+#include "chrome/common/chrome_switches.h"
 #include "chrome/installer/util/browser_distribution.h"
 #include "content/public/common/content_switches.h"
 
 namespace chrome {
 
 namespace {
 
 // Gets the default user data directory for either the current environment
 // (desktop or metro) or for the other one (metro or desktop).
 bool GetUserDataDirectoryForEnvironment(bool current, FilePath* result) {
   if (!PathService::Get(base::DIR_LOCAL_APP_DATA, result))
     return false;
   BrowserDistribution* dist = BrowserDistribution::GetDistribution();
   *result = result->Append(dist->GetInstallSubDir());
+
+  // TODO(rsimha): Continue to return the "Metro" subdirectory to allow testing
+  // of sync credential caching in the presence of strange singleton mode.
+  // Delete this block before shipping. See http://crbug.com/144280.
+  const CommandLine* command_line = CommandLine::ForCurrentProcess();
+  if ((command_line->HasSwitch(switches::kEnableSyncCredentialCaching)) &&
+      (base::win::IsMetroProcess() ? current : !current)) {
+    *result = result->Append(kMetroChromeUserDataSubDir);
+  }
+
   *result = result->Append(chrome::kUserDataDirname);
   return true;
 }
 
 }  // namespace
 
 bool GetDefaultUserDataDirectory(FilePath* result) {
   return GetUserDataDirectoryForEnvironment(true, result);
 }
 
@@ skipping 88 matching lines @@
   // investigated and fixed if possible.
   return process_type.empty() ||
          process_type == switches::kServiceProcess ||
          process_type == switches::kGpuProcess ||
          process_type == switches::kNaClBrokerProcess ||
          process_type == switches::kNaClLoaderProcess ||
          process_type == switches::kPpapiBrokerProcess;
 }
 
 }  // namespace chrome