Fix argument check in RandomNumberGenerator::NextInt.

src/base/utils/random-number-generator.cc

 // Copyright 2013 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.
 
 #include "src/base/utils/random-number-generator.h"
 
 #include <stdio.h>
 #include <stdlib.h>
 
 #include <new>
@@ skipping 61 matching lines @@
   // https://code.google.com/p/v8/issues/detail?id=2905
   int64_t seed = Time::NowFromSystemTime().ToInternalValue() << 24;
   seed ^= TimeTicks::HighResolutionNow().ToInternalValue() << 16;
   seed ^= TimeTicks::Now().ToInternalValue() << 8;
   SetSeed(seed);
 #endif  // V8_OS_CYGWIN || V8_OS_WIN
 }
 
 
 int RandomNumberGenerator::NextInt(int max) {
-  DCHECK_LE(0, max);
+  DCHECK_LT(0, max);
 
   // Fast path if max is a power of 2.
   if (IS_POWER_OF_TWO(max)) {
     return static_cast<int>((max * static_cast<int64_t>(Next(31))) >> 31);
   }
 
   while (true) {
     int rnd = Next(31);
     int val = rnd % max;
     if (rnd - val + (max - 1) >= 0) {
@@ skipping 30 matching lines @@
   return static_cast<int>(seed >> (48 - bits));
 }
 
 
 void RandomNumberGenerator::SetSeed(int64_t seed) {
   initial_seed_ = seed;
   seed_ = (seed ^ kMultiplier) & kMask;
 }
 
 } }  // namespace v8::base