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

chrome/browser/ui/android/tab_model/tab_model_list.h

 // Copyright (c) 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.
 
 #ifndef CHROME_BROWSER_UI_ANDROID_TAB_MODEL_TAB_MODEL_LIST_H_
 #define CHROME_BROWSER_UI_ANDROID_TAB_MODEL_TAB_MODEL_LIST_H_
 
 #include <vector>
 
-#include "components/sessions/session_id.h"
+#include "components/sessions/core/session_id.h"
 
 class Profile;
 class TabModel;
 
 namespace chrome {
 struct NavigateParams;
 }
 
 namespace content {
 class WebContents;
@@ skipping 20 matching lines @@
   static bool empty();
   static size_t size();
 
   static TabModel* get(size_t index);
 
  private:
   DISALLOW_IMPLICIT_CONSTRUCTORS(TabModelList);
 };
 
 #endif  // CHROME_BROWSER_UI_ANDROID_TAB_MODEL_TAB_MODEL_LIST_H_