Move all core files in //components/sessions into core/ subdir

components/sync_driver/revisit/current_tab_matcher.h

 // Copyright 2015 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.
 
 #ifndef COMPONENTS_SYNC_DRIVER_CURRENT_TAB_MATCHER_H_
 #define COMPONENTS_SYNC_DRIVER_CURRENT_TAB_MATCHER_H_
 
 #include "base/gtest_prod_util.h"
-#include "components/sessions/session_types.h"
+#include "components/sessions/core/session_types.h"
 #include "components/sync_driver/revisit/page_equality.h"
 #include "components/sync_driver/revisit/page_visit_observer.h"
 
 namespace sync_driver {
 
 // This class checks the current navigation entry for the given tabs to see if
 // they correspond to the same page we were constructed to look for. Upon
 // finding multiple matches, the most recently modified will be chosen.
 class CurrentTabMatcher {
  public:
   explicit CurrentTabMatcher(const PageEquality& page_equality);
   void Check(const sessions::SessionTab* tab);
   void Emit(const PageVisitObserver::TransitionType transition);
 
  private:
   FRIEND_TEST_ALL_PREFIXES(CurrentTabMatcherTest, Timestamp);
 
   const PageEquality page_equality_;
   const sessions::SessionTab* most_recent_match_ = nullptr;
 
   DISALLOW_COPY_AND_ASSIGN(CurrentTabMatcher);
 };
 
 }  // namespace sync_driver
 
 #endif  // COMPONENTS_SYNC_DRIVER_CURRENT_TAB_MATCHER_H_