Unify usage of logging/assert macros in base/

base/sequence_checker.h

 // 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.
 
 #ifndef BASE_SEQUENCE_CHECKER_H_
 #define BASE_SEQUENCE_CHECKER_H_
 
-// See comments for the similar block in thread_checker.h.
-#if (!defined(NDEBUG) || defined(DCHECK_ALWAYS_ON))
-#define ENABLE_SEQUENCE_CHECKER 1
-#else
-#define ENABLE_SEQUENCE_CHECKER 0
-#endif
-
 #include "base/sequence_checker_impl.h"
 
 namespace base {
 
 // Do nothing implementation, for use in release mode.
 //
 // Note: You should almost always use the SequenceChecker class to get
 // the right version for your build configuration.
 class SequenceCheckerDoNothing {
  public:
@@ skipping 15 matching lines @@
 //   void Foo() {
 //     DCHECK(sequence_checker_.CalledOnValidSequencedThread());
 //     ... (do stuff) ...
 //   }
 //
 //  private:
 //   SequenceChecker sequence_checker_;
 // }
 //
 // In Release mode, CalledOnValidSequencedThread() will always return true.
-#if ENABLE_SEQUENCE_CHECKER
+#if DCHECK_IS_ON()
 class SequenceChecker : public SequenceCheckerImpl {
 };
 #else
 class SequenceChecker : public SequenceCheckerDoNothing {
 };
-#endif  // ENABLE_SEQUENCE_CHECKER
-
-#undef ENABLE_SEQUENCE_CHECKER
+#endif  // DCHECK_IS_ON()
 
 }  // namespace base
 
 #endif  // BASE_SEQUENCE_CHECKER_H_