Change kNotSignedInProfile to kInitialProfile to better reflect its usage.

chrome/browser/diagnostics/diagnostics_test.cc

 // Copyright (c) 2010 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/browser/diagnostics/diagnostics_test.h"
 
 #include "base/file_path.h"
 #include "base/path_service.h"
 #include "chrome/common/chrome_constants.h"
 #include "chrome/common/chrome_paths.h"
@@ skipping 31 matching lines @@
                                    DiagnosticsModel::TestResult result) {
   additional_info_ = additional_info;
   result_ = result;
 }
 
 // static
 FilePath DiagnosticTest::GetUserDefaultProfileDir() {
   FilePath path;
   if (!PathService::Get(chrome::DIR_USER_DATA, &path))
     return FilePath();
-  return path.AppendASCII(chrome::kNotSignedInProfile);
+  return path.AppendASCII(chrome::kInitialProfile);
 }