Change includes of histogram.h to histogram_macros.h.

components/sessions/core/session_backend.cc

 // Copyright 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.
 
 #include "components/sessions/core/session_backend.h"
 
 #include <stdint.h>
 #include <limits>
 #include <utility>
 
 #include "base/files/file.h"
 #include "base/files/file_util.h"
 #include "base/macros.h"
 #include "base/memory/scoped_vector.h"
-#include "base/metrics/histogram.h"
+#include "base/metrics/histogram_macros.h"
 #include "base/threading/thread_restrictions.h"
 #include "build/build_config.h"
 
 using base::TimeTicks;
 
 namespace sessions {
 
 // File version number.
 static const int32_t kFileCurrentVersion = 1;
 
@@ skipping 376 matching lines @@
 base::FilePath SessionBackend::GetCurrentSessionPath() {
   base::FilePath path = path_to_dir_;
   if (type_ == sessions::BaseSessionService::TAB_RESTORE)
     path = path.AppendASCII(kCurrentTabSessionFileName);
   else
     path = path.AppendASCII(kCurrentSessionFileName);
   return path;
 }
 
 }  // namespace sessions