Change histogram.h includes to histogram_macros.h in metrics code.

BUG=416479

Review URL: https://codereview.chromium.org/1189653002

Cr-Commit-Position: refs/heads/master@{#334618}
diff --git a/components/metrics/metrics_service.cc b/components/metrics/metrics_service.cc
index 2938b2c72..78942796 100644
--- a/components/metrics/metrics_service.cc
+++ b/components/metrics/metrics_service.cc
@@ -129,8 +129,8 @@
 #include "base/bind.h"
 #include "base/callback.h"
 #include "base/location.h"
-#include "base/metrics/histogram.h"
 #include "base/metrics/histogram_base.h"
+#include "base/metrics/histogram_macros.h"
 #include "base/metrics/histogram_samples.h"
 #include "base/metrics/sparse_histogram.h"
 #include "base/metrics/statistics_recorder.h"