Abolish kDebug and use ifdef DEBUG throughout for consistency.

src/globals.h

 // Copyright 2006-2008 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 62 matching lines @@
 typedef uint16_t uc16;
 typedef signed int uc32;
 
 #ifndef ARM
 #define CAN_READ_UNALIGNED 1
 #endif
 
 // -----------------------------------------------------------------------------
 // Constants
 
-#ifdef DEBUG
-const bool kDebug = true;
-#else
-const bool kDebug = false;
-#endif  // DEBUG
-
 const int KB = 1024;
 const int MB = KB * KB;
 const int GB = KB * KB * KB;
 const int kMaxInt = 0x7FFFFFFF;
 const int kMinInt = -kMaxInt - 1;
 
 const int kCharSize     = sizeof(char);    // NOLINT
 const int kShortSize    = sizeof(short);   // NOLINT
 const int kIntSize      = sizeof(int);     // NOLINT
 const int kDoubleSize   = sizeof(double);  // NOLINT
@@ skipping 410 matching lines @@
 
   Dest dest;
   memcpy(&dest, &source, sizeof(dest));
   return dest;
 }
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_GLOBALS_H_