[TabManager] Move TabManager into chrome/browser/resource_coordinator.

chrome/browser/memory/tab_stats.cc

Index: chrome/browser/memory/tab_stats.cc
diff --git a/chrome/browser/memory/tab_stats.cc b/chrome/browser/memory/tab_stats.cc
deleted file mode 100644
index f0f1439a0bc1f3690350cb6e7efbee4a55d75568..0000000000000000000000000000000000000000
--- a/chrome/browser/memory/tab_stats.cc
+++ /dev/null
@@ -1,20 +0,0 @@
-// 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 "build/build_config.h"
-#include "chrome/browser/memory/tab_stats.h"
-
-namespace memory {
-
-TabStats::TabStats() = default;
-
-TabStats::TabStats(const TabStats& other) = default;
-
-TabStats::TabStats(TabStats&& other) noexcept = default;
-
-TabStats::~TabStats() {}
-
-TabStats& TabStats::operator=(const TabStats& other) = default;
-
-}  // namespace memory