Sync MDP: implement MemoryDumpProvider

components/sync/core_impl/test/fake_sync_manager.cc

Index: components/sync/core_impl/test/fake_sync_manager.cc
diff --git a/components/sync/core_impl/test/fake_sync_manager.cc b/components/sync/core_impl/test/fake_sync_manager.cc
index 3077ebe22c45ae36ba2811ed43f4a1a80fa6c27a..9e7799de2a7e4f17e0d2f2ff23fe16c571f24bec 100644
--- a/components/sync/core_impl/test/fake_sync_manager.cc
+++ b/components/sync/core_impl/test/fake_sync_manager.cc
@@ -186,6 +186,10 @@ SyncStatus FakeSyncManager::GetDetailedStatus() const {
   return SyncStatus();
 }
 
+void FakeSyncManager::OnMemoryDump(base::trace_event::ProcessMemoryDump* pmd) {
+  NOTIMPLEMENTED();
+}
+
 void FakeSyncManager::SaveChanges() {
   // Do nothing.
 }