Replace use of logging::DEBUG_MODE with DCHECK_IS_ON().

base/logging.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_LOGGING_H_
 #define BASE_LOGGING_H_
 
 #include <stddef.h>
 
 #include <cassert>
@@ skipping 729 matching lines @@
 
 #define DLOG_IS_ON(severity) false
 #define DLOG_IF(severity, condition) EAT_STREAM_PARAMETERS
 #define DLOG_ASSERT(condition) EAT_STREAM_PARAMETERS
 #define DPLOG_IF(severity, condition) EAT_STREAM_PARAMETERS
 #define DVLOG_IF(verboselevel, condition) EAT_STREAM_PARAMETERS
 #define DVPLOG_IF(verboselevel, condition) EAT_STREAM_PARAMETERS
 
 #endif  // DCHECK_IS_ON()
 
-// DEBUG_MODE is for runtime uses like
-//   if (DEBUG_MODE) foo.CheckThatFoo();
-// We tie its state to DCHECK_IS_ON().
-//
-// For compile-time checks, #if DCHECK_IS_ON() can be used.
-enum { DEBUG_MODE = DCHECK_IS_ON() };
-
 #define DLOG(severity)                                          \
   LAZY_STREAM(LOG_STREAM(severity), DLOG_IS_ON(severity))
 
 #define DPLOG(severity)                                         \
   LAZY_STREAM(PLOG_STREAM(severity), DLOG_IS_ON(severity))
 
 #define DVLOG(verboselevel) DVLOG_IF(verboselevel, VLOG_IS_ON(verboselevel))
 
 #define DVPLOG(verboselevel) DVPLOG_IF(verboselevel, VLOG_IS_ON(verboselevel))
 
@@ skipping 379 matching lines @@
 #elif NOTIMPLEMENTED_POLICY == 5
 #define NOTIMPLEMENTED() do {\
   static bool logged_once = false;\
   LOG_IF(ERROR, !logged_once) << NOTIMPLEMENTED_MSG;\
   logged_once = true;\
 } while(0);\
 EAT_STREAM_PARAMETERS
 #endif
 
 #endif  // BASE_LOGGING_H_