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

extensions/browser/updater/manifest_fetch_data.cc

 // Copyright 2014 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 "extensions/browser/updater/manifest_fetch_data.h"
 
 #include <vector>
 
 #include "base/logging.h"
-#include "base/metrics/histogram.h"
+#include "base/metrics/histogram_macros.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/string_util.h"
 #include "base/strings/stringprintf.h"
 #include "extensions/common/extension.h"
 #include "net/base/escape.h"
 
 namespace extensions {
 
 namespace {
 
@@ skipping 149 matching lines @@
     NOTREACHED();
   return value == kNeverPinged || value > 0;
 }
 
 void ManifestFetchData::Merge(const ManifestFetchData& other) {
   DCHECK(full_url() == other.full_url());
   request_ids_.insert(other.request_ids_.begin(), other.request_ids_.end());
 }
 
 }  // namespace extensions