Fix a typo. It will cause crash when client uses a histogram with bad maximum.

base/metrics/histogram.cc

 // 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.
 
 // Histogram is an object that aggregates statistics, and can summarize them in
 // various forms, including ASCII graphical, HTML, and numerically (as a
 // vector of numbers corresponding to each of the aggregating buckets).
 // See header file for details and examples.
 
 #include "base/metrics/histogram.h"
@@ skipping 440 matching lines @@
   }
 }
 
 // static
 bool Histogram::InspectConstructionArguments(const string& name,
                                              Sample* minimum,
                                              Sample* maximum,
                                              size_t* bucket_count) {
   // Defensive code for backward compatibility.
   if (*minimum < 1) {
-    DLOG(WARNING) << "Histogram: " << name << " Bad minimum: " << *minimum;
+    DVLOG(1) << "Histogram: " << name << " has bad minimum: " << *minimum;
     *minimum = 1;
   }
   if (*maximum >= kSampleType_MAX) {
-    DLOG(WARNING) << "Histogram: " << name << " Bad maximum: " << *maximum;
-    *maximum = kSampleType_MAX;
+    DVLOG(1) << "Histogram: " << name << " has bad maximum: " << *maximum;
+    *maximum = kSampleType_MAX - 1;
   }
 
   if (*bucket_count < 3 || *bucket_count >= kBucketCount_MAX)
     return false;
   if (*bucket_count > static_cast<size_t>(*maximum - *minimum + 2))
     return false;
   return true;
 }
 
 bool Histogram::SerializeRanges(Pickle* pickle) const {
@@ skipping 428 matching lines @@
 
   BucketRanges* bucket_ranges = new BucketRanges(ranges.size());
   for (size_t i = 0; i < ranges.size(); i++) {
     bucket_ranges->set_range(i, ranges[i]);
   }
   bucket_ranges->ResetChecksum();
   return bucket_ranges;
 }
 
 }  // namespace base