Convert //sync from scoped_ptr to std::unique_ptr

sync/internal_api/test/null_sync_context_proxy.cc

Index: sync/internal_api/test/null_sync_context_proxy.cc
diff --git a/sync/internal_api/test/null_sync_context_proxy.cc b/sync/internal_api/test/null_sync_context_proxy.cc
index 3695b1cfdb034235b4e79486a650850990387c66..8bed16b2e44c1a740e26832f46b9213d41e42a98 100644
--- a/sync/internal_api/test/null_sync_context_proxy.cc
+++ b/sync/internal_api/test/null_sync_context_proxy.cc
@@ -16,7 +16,7 @@ NullSyncContextProxy::~NullSyncContextProxy() {
 
 void NullSyncContextProxy::ConnectTypeToSync(
     syncer::ModelType type,
-    scoped_ptr<ActivationContext> activation_context) {
+    std::unique_ptr<ActivationContext> activation_context) {
   NOTREACHED() << "NullSyncContextProxy is not meant to be used";
 }
 
@@ -24,8 +24,8 @@ void NullSyncContextProxy::Disconnect(syncer::ModelType type) {
   NOTREACHED() << "NullSyncContextProxy is not meant to be used";
 }
 
-scoped_ptr<SyncContextProxy> NullSyncContextProxy::Clone() const {
-  return scoped_ptr<SyncContextProxy>(new NullSyncContextProxy());
+std::unique_ptr<SyncContextProxy> NullSyncContextProxy::Clone() const {
+  return std::unique_ptr<SyncContextProxy>(new NullSyncContextProxy());
 }
 
 }  // namespace syncer_v2