[Sync] Introduce DataTypeDebugListener and add plumbing to the DataTypeManager

The DataTypeDebugListener is an interface that allows glue components to pass
sync debug info to the sync debug event listener, which lives in the sync
internals on the sync thread. To do this we pass a WeakHandle at initialization
time all the way through to the PSS, which then uses it to create the
DataTypeManager.

Follow up patches will plumb DTC results to the DataTypeDebugListener.

BUG=158576

Review URL: https://chromiumcodereview.appspot.com/11365116

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@166616 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 5 insertions, 2 deletions

diff --git a/sync/internal_api/debug_info_event_listener_unittest.cc b/sync/internal_api/debug_info_event_listener_unittest.cc
index 236d6b0..131728b 100644
--- a/sync/internal_api/debug_info_event_listener_unittest.cc
+++ b/sync/internal_api/debug_info_event_listener_unittest.cc
@@ -24,11 +24,14 @@ TEST_F(DebugInfoEventListenerTest, VerifyEventsAdded) {
 
 TEST_F(DebugInfoEventListenerTest, VerifyQueueSize) {
   DebugInfoEventListener debug_info_event_listener;
-  for (int i = 0; i < 10; ++i) {
+  for (unsigned int i = 0; i < 2*kMaxEntries; ++i) {
     debug_info_event_listener.CreateAndAddEvent(
         sync_pb::DebugEventInfo::ENCRYPTION_COMPLETE);
   }
-  ASSERT_EQ(debug_info_event_listener.events_.size(), kMaxEntries);
+  sync_pb::DebugInfo debug_info;
+  debug_info_event_listener.GetAndClearDebugInfo(&debug_info);
+  ASSERT_TRUE(debug_info.events_dropped());
+  ASSERT_EQ(static_cast<int>(kMaxEntries), debug_info.events_size());
 }
 
 TEST_F(DebugInfoEventListenerTest, VerifyGetAndClearEvents) {