Prevent tabs sync during browser shutdown.

chrome/browser/sync/test/integration/sync_test.h

Index: chrome/browser/sync/test/integration/sync_test.h
diff --git a/chrome/browser/sync/test/integration/sync_test.h b/chrome/browser/sync/test/integration/sync_test.h
index da2ac60d9a4f83090ea9a3676fd5c96ab6be5e32..af11e8757e0565c8a5ab6a730ca88997e59e580d 100644
--- a/chrome/browser/sync/test/integration/sync_test.h
+++ b/chrome/browser/sync/test/integration/sync_test.h
@@ -252,6 +252,8 @@ class SyncTest : public InProcessBrowserTest {
   // Triggers a sync for the given |model_types| for the Profile at |index|.
   void TriggerSyncForModelTypes(int index, syncer::ModelTypeSet model_types);
 
+  void TearDownWithSpecificBrowserClose(int index);
+
  protected:
   // Add custom switches needed for running the test.
   virtual void AddTestSwitches(base::CommandLine* cl);
@@ -281,6 +283,9 @@ class SyncTest : public InProcessBrowserTest {
   // before the Profile object is created.
   void SetPreexistingPreferencesFileContents(const std::string& contents);
 
+  // Close browser window at index.
+  void CloseBrowserWindowAtIndex(size_t index);
+
   // Helper to ProfileManager::CreateProfileAsync that creates a new profile
   // used for UI Signin. Blocks until profile is created.
   static Profile* MakeProfileForUISignin(base::FilePath profile_path);
@@ -473,6 +478,9 @@ class SyncTest : public InProcessBrowserTest {
   // Profile object is created. If empty, no preexisting file will be written.
   std::string preexisting_preferences_file_contents_;
 
+  // Indicies of closed browsers. Stored to eliminate possible re-close.
+  std::set<size_t> closed_browsers_indicies_;
+
   DISALLOW_COPY_AND_ASSIGN(SyncTest);
 };