Prevent tabs sync during browser shutdown.

components/sync_sessions/sessions_sync_manager_unittest.cc

 // Copyright 2014 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/sessions_sync_manager.h"
 
 #include <stdint.h>
 
 #include <utility>
 
@@ skipping 1742 matching lines @@
       // The associate windows after the tab navigation.
       VerifyLocalHeaderChange(out[index++], 1, i + 1);
     }
   }
 
   // Verify tab delegates have Sync ids.
   EXPECT_EQ(0, window->GetTabAt(0)->GetSyncId());
   EXPECT_EQ(1, window->GetTabAt(1)->GetSyncId());
 }
 
+TEST_F(SessionsSyncManagerTest, TabSyncChangesOnShutdown) {
+  SyncChangeList out;
+  // Init with no local data, relies on MergeLocalSessionNoTabs.
+  TestSyncedWindowDelegate* window = AddWindow();
+  SessionID::id_type window_id = window->GetSessionId();
+  InitWithSyncDataTakeOutput(syncer::SyncDataList(), &out);
+  EXPECT_FALSE(manager()->current_machine_tag().empty());
+  EXPECT_EQ(2U, out.size());
+
+  NavigateTab(AddTab(window_id, kFoo1), kFoo2);
+  NavigateTab(AddTab(window_id, kBar1), kBar2);
+  out.clear();
+
+  EXPECT_FALSE(manager()->GetAllBrowsersClosingForTesting());
+  manager()->SetAllBrowsersClosing(true);
+  browser()->tab_strip_model()->CloseWebContentsAt(1,
+                                                   TabStripModel::CLOSE_NONE);
+  EXPECT_EQ(0U, out.size());
+
+  manager()->SetAllBrowsersClosing(false);
+  browser()->tab_strip_model()->CloseAllTabs();
+  EXPECT_EQ(1U, out.size());
+}
+
 TEST_F(SessionsSyncManagerTest, ForeignSessionModifiedTime) {
   SyncDataList foreign_data;
   base::Time newest_time = base::Time::Now() - base::TimeDelta::FromDays(1);
   base::Time middle_time = base::Time::Now() - base::TimeDelta::FromDays(2);
   base::Time oldest_time = base::Time::Now() - base::TimeDelta::FromDays(3);
 
   {
     std::string session_tag = "tag1";
     SessionID::id_type n[] = {1, 2};
     std::vector<SessionID::id_type> tab_list(n, n + arraysize(n));
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   // Because tab 2 is a placeholder, tab 1's URL will be preserved.
   VerifyLocalTabChange(out[1], 1, kFoo1);
   EXPECT_EQ(sync_id, out[1].sync_data().GetSpecifics().session().tab_node_id());
   EXPECT_EQ(tab2.GetSessionId(),
             out[1].sync_data().GetSpecifics().session().tab().tab_id());
   EXPECT_EQ(window2->GetSessionId(),
             out[1].sync_data().GetSpecifics().session().tab().window_id());
 }
 
 }  // namespace sync_sessions