Migrate more files to histogram_macros.h from histogram.h.

components/dom_distiller/content/renderer/distillability_agent.cc

Index: components/dom_distiller/content/renderer/distillability_agent.cc
diff --git a/components/dom_distiller/content/renderer/distillability_agent.cc b/components/dom_distiller/content/renderer/distillability_agent.cc
index 543a47df741821fae2228f82f61ef934b45011e3..41cbf92f8838f0daf76ecd4d681607b3fbea74e2 100644
--- a/components/dom_distiller/content/renderer/distillability_agent.cc
+++ b/components/dom_distiller/content/renderer/distillability_agent.cc
@@ -2,11 +2,11 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#include "base/metrics/histogram.h"
-#include "base/strings/string_util.h"
+#include "components/dom_distiller/content/renderer/distillability_agent.h"
 
+#include "base/metrics/histogram_macros.h"
+#include "base/strings/string_util.h"
 #include "components/dom_distiller/content/common/distillability_service.mojom.h"
-#include "components/dom_distiller/content/renderer/distillability_agent.h"
 #include "components/dom_distiller/core/distillable_page_detector.h"
 #include "components/dom_distiller/core/experiments.h"
 #include "components/dom_distiller/core/page_features.h"