[Sync] Fix thread-ordering-dependent NULL dereference in NewNonFrontendDTC

chrome/browser/sync/test/integration/migration_errors_test.cc

Index: chrome/browser/sync/test/integration/migration_errors_test.cc
diff --git a/chrome/browser/sync/test/integration/migration_errors_test.cc b/chrome/browser/sync/test/integration/migration_errors_test.cc
index 1c073c2d2936ecf64c69a063023bdde918578370..50f4080d5cf107a715f848f60d42f7d1835efb1d 100644
--- a/chrome/browser/sync/test/integration/migration_errors_test.cc
+++ b/chrome/browser/sync/test/integration/migration_errors_test.cc
@@ -270,9 +270,8 @@ IN_PROC_BROWSER_TEST_F(MigrationSingleClientTest, AllTypesIndividually) {
   RunSingleClientMigrationTest(GetPreferredDataTypesList(), MODIFY_BOOKMARK);
 }
 
-// This test is crashing on Win and Linux sync bots. http://crbug.com/107743
 IN_PROC_BROWSER_TEST_F(MigrationSingleClientTest,
-                       DISABLED_AllTypesIndividuallyTriggerNotification) {
+                       AllTypesIndividuallyTriggerNotification) {
   ASSERT_TRUE(SetupClients());
   RunSingleClientMigrationTest(GetPreferredDataTypesList(),
                                TRIGGER_NOTIFICATION);
@@ -359,12 +358,9 @@ IN_PROC_BROWSER_TEST_F(MigrationTwoClientTest,
       MODIFY_BOOKMARK);
 }
 
-// Flaky on Mac 10.6 Sync bot and crashes on Win7 sync bot:
-// http://crbug.com/107205.
 // Migrate every datatype in sequence; the catch being that the server
 // will only tell the client about the migrations one at a time.
-IN_PROC_BROWSER_TEST_F(MigrationTwoClientTest,
-                       DISABLED_MigrationHellWithoutNigori) {
+IN_PROC_BROWSER_TEST_F(MigrationTwoClientTest, MigrationHellWithoutNigori) {
   ASSERT_TRUE(SetupClients());
   MigrationList migration_list = GetPreferredDataTypesList();
   // Let the first nudge be a datatype that's neither prefs nor
@@ -373,10 +369,7 @@ IN_PROC_BROWSER_TEST_F(MigrationTwoClientTest,
   RunTwoClientMigrationTest(migration_list, MODIFY_BOOKMARK);
 }
 
-// Flaky on Mac 10.6 Sync bot and crashes on Win7 sync bot:
-// http://crbug.com/107205.
-IN_PROC_BROWSER_TEST_F(MigrationTwoClientTest,
-                       DISABLED_MigrationHellWithNigori) {
+IN_PROC_BROWSER_TEST_F(MigrationTwoClientTest, MigrationHellWithNigori) {
   ASSERT_TRUE(SetupClients());
   MigrationList migration_list = GetPreferredDataTypesList();
   // Let the first nudge be a datatype that's neither prefs nor