[Sync] Introduce SyncedSessionWindow type.

components/sessions/core/session_types_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/sessions/core/session_types.h"
 
 #include <cstddef>
 #include <string>
 
 #include "base/strings/string_number_conversions.h"
@@ skipping 19 matching lines @@
   sync_data.set_current_navigation_index(3);
   sync_data.set_pinned(true);
   sync_data.set_extension_app_id("app_id");
   for (int i = 0; i < 5; ++i) {
     sync_pb::TabNavigation* navigation = sync_data.add_navigation();
     navigation->set_virtual_url("http://foo/" + base::IntToString(i));
     navigation->set_referrer("referrer");
     navigation->set_title("title");
     navigation->set_page_transition(sync_pb::SyncEnums_PageTransition_TYPED);
   }
-  sync_data.add_variation_id(3312238);
-  sync_data.add_variation_id(3312242);
 
   sessions::SessionTab tab;
   tab.window_id.set_id(100);
   tab.tab_id.set_id(100);
   tab.tab_visual_index = 100;
   tab.current_navigation_index = 1000;
   tab.pinned = false;
   tab.extension_app_id = "fake";
   tab.user_agent_override = "fake";
   tab.timestamp = base::Time::FromInternalValue(100);
@@ skipping 12 matching lines @@
   ASSERT_EQ(5u, tab.navigations.size());
   for (int i = 0; i < 5; ++i) {
     EXPECT_EQ(i, tab.navigations[i].index());
     EXPECT_EQ(GURL("referrer"), tab.navigations[i].referrer_url());
     EXPECT_EQ(base::ASCIIToUTF16("title"),tab.navigations[i].title());
     EXPECT_TRUE(ui::PageTransitionTypeIncludingQualifiersIs(
         tab.navigations[i].transition_type(), ui::PAGE_TRANSITION_TYPED));
     EXPECT_EQ(GURL("http://foo/" + base::IntToString(i)),
               tab.navigations[i].virtual_url());
   }
-  ASSERT_EQ(2u, tab.variation_ids.size());
-  EXPECT_EQ(3312238, tab.variation_ids[0]);
-  EXPECT_EQ(3312242, tab.variation_ids[1]);
   EXPECT_TRUE(tab.session_storage_persistent_id.empty());
 }
 
 TEST(SessionTab, ToSyncData) {
   sessions::SessionTab tab;
   tab.window_id.set_id(10);
   tab.tab_id.set_id(5);
   tab.tab_visual_index = 13;
   tab.current_navigation_index = 3;
   tab.pinned = true;
   tab.extension_app_id = "app_id";
   tab.user_agent_override = "fake";
   tab.timestamp = base::Time::FromInternalValue(100);
   for (int i = 0; i < 5; ++i) {
     tab.navigations.push_back(
         sessions::SerializedNavigationEntryTestHelper::CreateNavigation(
             "http://foo/" + base::IntToString(i), "title"));
   }
   tab.session_storage_persistent_id = "fake";
-  tab.variation_ids.push_back(3312238);
-  tab.variation_ids.push_back(3312242);
 
   const sync_pb::SessionTab& sync_data = tab.ToSyncData();
   EXPECT_EQ(5, sync_data.tab_id());
   EXPECT_EQ(10, sync_data.window_id());
   EXPECT_EQ(13, sync_data.tab_visual_index());
   EXPECT_EQ(3, sync_data.current_navigation_index());
   EXPECT_TRUE(sync_data.pinned());
   EXPECT_EQ("app_id", sync_data.extension_app_id());
   ASSERT_EQ(5, sync_data.navigation_size());
   for (int i = 0; i < 5; ++i) {
     EXPECT_EQ(tab.navigations[i].virtual_url().spec(),
               sync_data.navigation(i).virtual_url());
     EXPECT_EQ(base::UTF16ToUTF8(tab.navigations[i].title()),
               sync_data.navigation(i).title());
   }
   EXPECT_FALSE(sync_data.has_favicon());
   EXPECT_FALSE(sync_data.has_favicon_type());
   EXPECT_FALSE(sync_data.has_favicon_source());
-
-  ASSERT_EQ(2, sync_data.variation_id_size());
-  EXPECT_EQ(3312238u, sync_data.variation_id(0));
-  EXPECT_EQ(3312242u, sync_data.variation_id(1));
 }
 
 }  // namespace