Make TabRestoreService::Entry noncopyable and fix up surrounding code.

components/sessions/core/tab_restore_service_unittest.cc

-// Copyright 2016 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/sessions/core/tab_restore_service.h"
-
-#include "testing/gtest/include/gtest/gtest.h"
-
-namespace sessions {
-
-namespace {
-
-void PopulateTab(TabRestoreService::Tab* tab) {
-  tab->timestamp = base::Time::FromDoubleT(100.0);
-  tab->from_last_session = true;
-  tab->current_navigation_index = 42;
-  tab->browser_id = 1;
-  tab->tabstrip_index = 5;
-  tab->pinned = true;
-  tab->extension_app_id = "dummy";
-  tab->user_agent_override = "override";
-}
-
-void TestEntryEquality(TabRestoreService::Entry* expected,
-                       TabRestoreService::Entry* actual) {
-  EXPECT_EQ(expected->id, actual->id);
-  EXPECT_EQ(expected->type, actual->type);
-  EXPECT_EQ(expected->timestamp, actual->timestamp);
-  EXPECT_EQ(expected->from_last_session, actual->from_last_session);
-}
-
-void TestTabEquality(TabRestoreService::Tab* expected,
-                     TabRestoreService::Tab* actual) {
-  TestEntryEquality(expected, actual);
-  EXPECT_EQ(expected->current_navigation_index,
-            actual->current_navigation_index);
-  EXPECT_EQ(expected->browser_id, actual->browser_id);
-  EXPECT_EQ(expected->tabstrip_index, actual->tabstrip_index);
-  EXPECT_EQ(expected->pinned, actual->pinned);
-  EXPECT_EQ(expected->extension_app_id, actual->extension_app_id);
-  EXPECT_EQ(expected->user_agent_override, actual->user_agent_override);
-}
-
-TEST(Tab, CopyConstructor) {
-  TabRestoreService::Tab tab_to_copy;
-  PopulateTab(&tab_to_copy);
-
-  TabRestoreService::Tab copied_tab(tab_to_copy);
-  TestTabEquality(&tab_to_copy, &copied_tab);
-}
-
-TEST(Tab, AssignmentOperator) {
-  TabRestoreService::Tab tab_to_assign;
-  PopulateTab(&tab_to_assign);
-
-  TabRestoreService::Tab assigned_tab;
-  assigned_tab = tab_to_assign;
-  TestTabEquality(&tab_to_assign, &assigned_tab);
-}
-
-}  // namespace
-
-}  // namespace sessions