[Sync] Rely on directory to decide which types need to be purged

Preivously we relied on the SyncBackendRegistrar's last configured types to
decide which types have been recently disabled. Now we just purge all disabled
types that exist in the directory, as recorded by their progress markers (which
should never be deleted unless the type has been purged).

BUG=386778

Review URL: https://codereview.chromium.org/398813005

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@284283 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 8 insertions, 0 deletions

diff --git a/sync/engine/syncer_unittest.cc b/sync/engine/syncer_unittest.cc
index 6f891e8d..160ed9c 100644
--- a/sync/engine/syncer_unittest.cc
+++ b/sync/engine/syncer_unittest.cc
@@ -1037,6 +1037,10 @@ TEST_F(SyncerTest, TestPurgeWhileUnsynced) {
   // Similar to above, but throw a purge operation into the mix. Bug 49278.
   syncable::Id pref_node_id = TestIdFactory::MakeServer("Tim");
   {
+    directory()->SetDownloadProgress(BOOKMARKS,
+                                     syncable::BuildProgress(BOOKMARKS));
+    directory()->SetDownloadProgress(PREFERENCES,
+                                     syncable::BuildProgress(PREFERENCES));
     WriteTransaction wtrans(FROM_HERE, UNITTEST, directory());
     MutableEntry parent(&wtrans, CREATE, BOOKMARKS, wtrans.root_id(), "Pete");
     ASSERT_TRUE(parent.good());
@@ -1086,6 +1090,8 @@ TEST_F(SyncerTest, TestPurgeWhileUnsynced) {
 TEST_F(SyncerTest, TestPurgeWhileUnapplied) {
   // Similar to above, but for unapplied items. Bug 49278.
   {
+    directory()->SetDownloadProgress(BOOKMARKS,
+                                     syncable::BuildProgress(BOOKMARKS));
     WriteTransaction wtrans(FROM_HERE, UNITTEST, directory());
     MutableEntry parent(&wtrans, CREATE, BOOKMARKS, wtrans.root_id(), "Pete");
     ASSERT_TRUE(parent.good());
@@ -1111,6 +1117,8 @@ TEST_F(SyncerTest, TestPurgeWhileUnapplied) {
 
 TEST_F(SyncerTest, TestPurgeWithJournal) {
   {
+    directory()->SetDownloadProgress(BOOKMARKS,
+                                     syncable::BuildProgress(BOOKMARKS));
     WriteTransaction wtrans(FROM_HERE, UNITTEST, directory());
     MutableEntry parent(&wtrans, syncable::CREATE, BOOKMARKS, wtrans.root_id(),
                         "Pete");