Make RUNTIME_ASSERT have more useful output in debug mode

src/base/logging.h

 // Copyright 2012 the V8 project 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 V8_BASE_LOGGING_H_
 #define V8_BASE_LOGGING_H_
 
 #include <cstring>
 #include <sstream>
 #include <string>
 
 #include "src/base/build_config.h"
 
 extern "C" V8_NORETURN void V8_Fatal(const char* file, int line,
                                      const char* format, ...);
 
+extern "C" void V8_RuntimeError(const char* file, int line,
+                                const char* message);
 
 // The FATAL, UNREACHABLE and UNIMPLEMENTED macros are useful during
 // development, but they should not be relied on in the final product.
 #ifdef DEBUG
 #define FATAL(msg)                              \
   V8_Fatal(__FILE__, __LINE__, "%s", (msg))
 #define UNIMPLEMENTED()                         \
   V8_Fatal(__FILE__, __LINE__, "unimplemented code")
 #define UNREACHABLE()                           \
   V8_Fatal(__FILE__, __LINE__, "unreachable code")
@@ skipping 141 matching lines @@
 #define DCHECK_GT(v1, v2)      ((void) 0)
 #define DCHECK_GE(v1, v2)      ((void) 0)
 #define DCHECK_LT(v1, v2)      ((void) 0)
 #define DCHECK_LE(v1, v2)      ((void) 0)
 #define DCHECK_NULL(val)       ((void) 0)
 #define DCHECK_NOT_NULL(val)   ((void) 0)
 #define DCHECK_IMPLIES(v1, v2) ((void) 0)
 #endif
 
 #endif  // V8_BASE_LOGGING_H_