Migrate chrome/browser files to histogram_macros.h includes.

chrome/browser/prerender/prerender_util.cc

 // Copyright (c) 2011 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/prerender/prerender_util.h"
 
 #include "base/logging.h"
-#include "base/metrics/histogram.h"
+#include "base/metrics/histogram_macros.h"
 #include "base/metrics/sparse_histogram.h"
 #include "base/strings/string_util.h"
 #include "content/public/browser/resource_request_info.h"
 #include "content/public/common/resource_type.h"
 #include "net/http/http_response_headers.h"
 #include "net/url_request/url_request.h"
 #include "url/third_party/mozilla/url_parse.h"
 #include "url/url_canon.h"
 #include "url/url_util.h"
 
@@ skipping 93 matching lines @@
     ReportPrerenderSchemeCancelReason(
         PRERENDER_SCHEME_CANCEL_REASON_CHROME_EXTENSION);
   } else if (url.SchemeIs("about")) {
     ReportPrerenderSchemeCancelReason(PRERENDER_SCHEME_CANCEL_REASON_ABOUT);
   } else {
     ReportPrerenderSchemeCancelReason(PRERENDER_SCHEME_CANCEL_REASON_UNKNOWN);
   }
 }
 
 }  // namespace prerender