Move sync performance tests into new target

chrome/test/live_sync/live_sync_timing_helper.cc

-// Copyright (c) 2011 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 "chrome/test/live_sync/live_sync_timing_helper.h"
-
-#include "base/time.h"
-#include "chrome/browser/sync/profile_sync_service_harness.h"
-#include "testing/gtest/include/gtest/gtest.h"
-
-LiveSyncTimingHelper::LiveSyncTimingHelper() {}
-
-LiveSyncTimingHelper::~LiveSyncTimingHelper() {}
-
-base::TimeDelta LiveSyncTimingHelper::TimeSyncCycle(
-    ProfileSyncServiceHarness* client) {
-  base::Time start = base::Time::Now();
-  EXPECT_TRUE(client->AwaitSyncCycleCompletion("Timing sync cycle."));
-  return base::Time::Now() - start;
-}
-
-base::TimeDelta LiveSyncTimingHelper::TimeMutualSyncCycle(
-    ProfileSyncServiceHarness* client, ProfileSyncServiceHarness* partner) {
-  base::Time start = base::Time::Now();
-  EXPECT_TRUE(client->AwaitMutualSyncCycleCompletion(partner));
-  return base::Time::Now() - start;
-}
-
-base::TimeDelta LiveSyncTimingHelper::TimeUntilQuiescence(
-    std::vector<ProfileSyncServiceHarness*>& clients) {
-  base::Time start = base::Time::Now();
-  EXPECT_TRUE(ProfileSyncServiceHarness::AwaitQuiescence(clients));
-  return base::Time::Now() - start;
-}