Migrate chrome/browser files to histogram_macros.h includes.

chrome/browser/chrome_browser_application_mac_unittest.mm

 // 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.
 
 #import "chrome/browser/chrome_browser_application_mac.h"
 
 #import <Cocoa/Cocoa.h>
 #include <stddef.h>
 
 #include <memory>
 
-#include "base/metrics/histogram.h"
+#include "base/metrics/histogram_macros.h"
 #include "base/metrics/histogram_samples.h"
 #include "base/metrics/statistics_recorder.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 using base::HistogramBase;
 using base::HistogramSamples;
 using base::StatisticsRecorder;
 
 namespace chrome_browser_application_mac {
 
@@ skipping 62 matching lines @@
   EXPECT_EQ(2, samples->GetCount(3));
 
   // The unknown exceptions should end up in the overflow bucket.
   EXPECT_TRUE(histograms[0]->HasConstructionArguments(1,
                                                       kUnknownNSException,
                                                       kUnknownNSException + 1));
   EXPECT_EQ(4, samples->GetCount(kUnknownNSException));
 }
 
 }  // chrome_browser_application_mac