Cleanup histograms from message loop, as well as kHexRangePrintingFlag.

base/metrics/histogram_base.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.
 
 #include "base/metrics/histogram_base.h"
 
 #include <limits.h>
 
 #include <memory>
 #include <utility>
@@ skipping 155 matching lines @@
 
   while (0 < x_count--)
     output->append("-");
   output->append("O");
   while (0 < x_remainder--)
     output->append(" ");
 }
 
 const std::string HistogramBase::GetSimpleAsciiBucketRange(
     Sample sample) const {
-  std::string result;
-  if (kHexRangePrintingFlag & flags())
-    StringAppendF(&result, "%#x", sample);
-  else
-    StringAppendF(&result, "%d", sample);
-  return result;
+  return StringPrintf("%d", sample);
 }
 
 void HistogramBase::WriteAsciiBucketValue(Count current,
                                           double scaled_sum,
                                           std::string* output) const {
   StringAppendF(output, " (%d = %3.1f%%)", current, current/scaled_sum);
 }
 
 // static
 void HistogramBase::ReportHistogramActivity(const HistogramBase& histogram,
@@ skipping 32 matching lines @@
         report_histogram_->Add(HISTOGRAM_REPORT_FLAG_UMA_TARGETED);
       break;
 
     case HISTOGRAM_LOOKUP:
       report_histogram_->Add(HISTOGRAM_REPORT_HISTOGRAM_LOOKUP);
       break;
   }
 }
 
 }  // namespace base