net: Add fuzzer for HostResolverImpl.

net/base/fuzzed_data_provider.cc

 // Copyright 2016 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.
 
 #include "net/base/fuzzed_data_provider.h"
 
 #include <algorithm>
 #include <limits>
 
 #include "base/logging.h"
@@ skipping 36 matching lines @@
     offset += 8;
   }
 
   // Avoid division by 0, in the case |range + 1| results in overflow.
   if (range == std::numeric_limits<uint32_t>::max())
     return result;
 
   return min + result % (range + 1);
 }
 
+int FuzzedDataProvider::ConsumeValueInRangeInt(int min, int max) {
+  CHECK_LE(min, max);
+
+  uint32_t range = max - min;
+  return min + ConsumeValueInRange(0, range);
+}
+
 bool FuzzedDataProvider::ConsumeBool() {
   return (ConsumeUint8() & 0x01) == 0x01;
 }
 
 uint8_t FuzzedDataProvider::ConsumeUint8() {
   return ConsumeValueInRange(0, 0xFF);
 }
 
 uint16_t FuzzedDataProvider::ConsumeUint16() {
   return ConsumeValueInRange(0, 0xFFFF);
 }
 
 }  // namespace net