Make ui_chromeos_resources IDRs accessible via chrome://theme/<IDR>.

chrome/browser/resources_util_unittest.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/browser/resources_util.h"
 
 #include "grit/theme_resources.h"
 #include "grit/ui_resources.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
+#if defined(OS_CHROMEOS)
+#include "grit/ui_chromeos_resources.h"
+#endif
+
 TEST(ResourcesUtil, SpotCheckIds) {
   const struct {
     const char* name;
     int id;
   } kCases[] = {
     // IDRs from chrome/app/theme/theme_resources.grd should be valid.
     {"IDR_BACK", IDR_BACK},
     {"IDR_STOP", IDR_STOP},
     // IDRs from ui/resources/ui_resources.grd should be valid.
     {"IDR_CHECKMARK", IDR_CHECKMARK},
     {"IDR_THROBBER", IDR_THROBBER},
+#if defined(OS_CHROMEOS)
+    // Check IDRs from ui/chromeos/resources/ui_chromeos_resources.grd.
+    {"IDR_LOGIN_DEFAULT_USER", IDR_LOGIN_DEFAULT_USER},
+#endif
     // Unknown names should be invalid and return -1.
     {"foobar", -1},
     {"backstar", -1},
   };
 
   for (size_t i = 0; i < ARRAYSIZE_UNSAFE(kCases); ++i)
     EXPECT_EQ(kCases[i].id, ResourcesUtil::GetThemeResourceId(kCases[i].name));
 }