Migrate chrome/browser files to histogram_macros.h includes.

chrome/browser/safe_browsing/srt_field_trial_win.cc

 // Copyright 2015 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 "chrome/browser/safe_browsing/srt_field_trial_win.h"
 
 #include "base/metrics/field_trial.h"
-#include "base/metrics/histogram.h"
+#include "base/metrics/histogram_macros.h"
 #include "base/strings/string_util.h"
 #include "components/variations/variations_associated_data.h"
 
 namespace {
 
 // Field trial strings.
 const char kSRTPromptTrial[] = "SRTPromptFieldTrial";
 const char kSRTCanaryGroup[] = "SRTCanary";
 const char kSRTPromptOffGroup[] = "Off";
 const char kSRTPromptSeedParam[] = "Seed";
@@ skipping 45 matching lines @@
   return variations::GetVariationParamValue(kSRTPromptTrial,
                                             kSRTPromptSeedParam);
 }
 
 void RecordSRTPromptHistogram(SRTPromptHistogramValue value) {
   UMA_HISTOGRAM_ENUMERATION("SoftwareReporter.PromptUsage", value,
                             SRT_PROMPT_MAX);
 }
 
 }  // namespace safe_browsing