Migrate SkRTConfRegistry test to DEF_TEST().

src/utils/SkRTConf.cpp

 /*
  * Copyright 2013 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkRTConf.h"
 #include "SkOSFile.h"
 
@@ skipping 307 matching lines @@
 template void SkRTConfRegistry::set(const char *name, char * value, bool);
 
 SkRTConfRegistry &skRTConfRegistry() {
     static SkRTConfRegistry r;
     return r;
 }
 
 
 #ifdef SK_SUPPORT_UNITTEST
 
-#ifdef SK_BUILD_FOR_WIN32
-static void sk_setenv(const char* key, const char* value) {
-    _putenv_s(key, value);
-}
-#else
-static void sk_setenv(const char* key, const char* value) {
-    setenv(key, value, 1);
-}
-#endif
-
-void SkRTConfRegistry::UnitTest() {
-    SkRTConfRegistry registryWithoutContents(true);
-
-    sk_setenv("skia_nonexistent_item", "132");
-    int result = 0;
-    registryWithoutContents.parse("nonexistent.item", &result);
-    SkASSERT(result == 132);
+SkRTConfRegistry::SkRTConfRegistry()
+    : fConfs(100) {
 }
 
-SkRTConfRegistry::SkRTConfRegistry(bool)
-    : fConfs(100) {
-}
 #endif