[Sync] Creating sync_sessions component, moving revisit logic.

components/sync_sessions/revisit/page_equality.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_PAGE_EQUALITY_H_
-#define COMPONENTS_SYNC_DRIVER_PAGE_EQUALITY_H_
+#ifndef COMPONENTS_SYNC_SESSIONS_REVISIT_PAGE_EQUALITY_H_
+#define COMPONENTS_SYNC_SESSIONS_REVISIT_PAGE_EQUALITY_H_
 
-namespace sync_driver {
+namespace sync_sessions {
 
 // An extremely simplistic approach to determining page equality, given two
 // URLs. Some of the notable examples this fails to accommodate are varying
 // schemes, mobile subdomains, unimpactful query parameters/fragments, and
 // page changing headers/cookies.
 class PageEquality {
  public:
   explicit PageEquality(const GURL& url) : url_(url) {}
   PageEquality(const PageEquality&) = default;
   bool IsSamePage(const GURL& url) const { return url == url_; }
 
  private:
   const GURL url_;
 };
 
-}  // namespace sync_driver
+}  // namespace sync_sessions
 
-#endif  // COMPONENTS_SYNC_DRIVER_PAGE_EQUALITY_H_
+#endif  // COMPONENTS_SYNC_SESSIONS_REVISIT_PAGE_EQUALITY_H_