[Sync] Creating sync_sessions component, moving revisit logic.

components/sync_sessions/revisit/current_tab_matcher_unittest.cc

 // 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.
 
-#include "components/sync_driver/revisit/current_tab_matcher.h"
+#include "components/sync_sessions/revisit/current_tab_matcher.h"
 
 #include "base/memory/scoped_ptr.h"
 #include "base/test/histogram_tester.h"
 #include "base/time/time.h"
 #include "components/sessions/core/serialized_navigation_entry.h"
 #include "components/sessions/core/serialized_navigation_entry_test_helper.h"
 #include "components/sessions/core/session_types.h"
-#include "components/sync_driver/revisit/page_equality.h"
+#include "components/sync_sessions/revisit/page_equality.h"
+#include "components/sync_sessions/revisit/page_visit_observer.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "url/gurl.h"
 
 using sessions::SessionTab;
 
-namespace sync_driver {
+namespace sync_sessions {
 
 namespace {
 
 static const std::string kExampleUrl = "http://www.example.com";
 static const std::string kDifferentUrl = "http://www.different.com";
 
 sessions::SerializedNavigationEntry Entry(const std::string& url) {
   return sessions::SerializedNavigationEntryTestHelper::CreateNavigation(url,
                                                                          "");
 }
@@ skipping 74 matching lines @@
   matcher1.Check(tab2.get());
   ASSERT_EQ(tab2.get(), matcher1.most_recent_match_);
 
   // Now repeat the same test but check the tabs in the opposite order.
   CurrentTabMatcher matcher2((PageEquality(GURL(kExampleUrl))));
   matcher2.Check(tab2.get());
   matcher2.Check(tab1.get());
   ASSERT_EQ(tab2.get(), matcher2.most_recent_match_);
 }
 
-}  // namespace sync_driver
+}  // namespace sync_sessions