[Sync] Removing duplicate includes, part 2.

components/sync_sessions/synced_session_tracker_unittest.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/sync_sessions/synced_session_tracker.h"
 
-#include <string>
-#include <vector>
-
 #include "base/rand_util.h"
 #include "base/strings/stringprintf.h"
 #include "base/strings/utf_string_conversions.h"
 #include "components/sessions/core/serialized_navigation_entry_test_helper.h"
-#include "components/sessions/core/session_types.h"
 #include "components/sync_sessions/fake_sync_sessions_client.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace sync_sessions {
 
 namespace {
 
 const char kValidUrl[] = "http://www.example.com";
 const char kInvalidUrl[] = "invalid.url";
 
@@ skipping 338 matching lines @@
   GetTracker()->LookupTabNodeIds(session_tag, &result);
   EXPECT_EQ(1U, result.size());
   EXPECT_TRUE(result.find(tab_node_id_4) != result.end());
 
   GetTracker()->DeleteForeignTab(session_tag, tab_node_id_4);
   GetTracker()->LookupTabNodeIds(session_tag, &result);
   EXPECT_TRUE(result.empty());
 }
 
 }  // namespace sync_sessions