Repurpose Release_Developer BUILDTYPE and remove SK_DEVELOPER.

tests/RuntimeConfigTest.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 "Test.h"
 
 SK_CONF_DECLARE(int, c_RTConfTestVariable,
                 "test.utils.rtconf.testVariable", 1,
                 "This is only a test. Do not be alarmed.");
 // TODO(skia-team): more comprehensive unit tests of the SkRTConf
 // system.
 DEF_TEST(RuntimeConfig, reporter) {
     REPORTER_ASSERT(reporter, 1 == c_RTConfTestVariable);
 
     SK_CONF_SET("test.utils.rtconf.testVariable", 2);
-#ifdef SK_DEVELOPER
+#ifdef SK_DEBUG
     REPORTER_ASSERT(reporter, 2 == c_RTConfTestVariable);
-#else  // not SK_DEVELOPER
-    // Can not change RTConf variables in Release.
+#else  // not SK_DEBUG
+    // Can not change RTConf variables in SK_RELEASE.
     REPORTER_ASSERT(reporter, 1 == c_RTConfTestVariable);
-#endif  // SK_DEVELOPER
+#endif  // SK_DEBUG
 
     // This should not give a warning.
     SK_CONF_TRY_SET("test.utils.rtconf.nonexistentVariable", 7);
 }