Convert //sync from scoped_ptr to std::unique_ptr

sync/internal_api/http_bridge_unittest.cc

Index: sync/internal_api/http_bridge_unittest.cc
diff --git a/sync/internal_api/http_bridge_unittest.cc b/sync/internal_api/http_bridge_unittest.cc
index f69bc755da6ee0f18fc4fb07d599bacb33736a16..d2620d503b3556f6a3e344303440b8c8ab0eac39 100644
--- a/sync/internal_api/http_bridge_unittest.cc
+++ b/sync/internal_api/http_bridge_unittest.cc
@@ -475,7 +475,7 @@ void HttpBridgeRunOnSyncThread(
     syncer::HttpPostProviderInterface** bridge_out,
     base::WaitableEvent* signal_when_created,
     base::WaitableEvent* wait_for_shutdown) {
-  scoped_ptr<syncer::HttpBridgeFactory> bridge_factory(
+  std::unique_ptr<syncer::HttpBridgeFactory> bridge_factory(
       new syncer::HttpBridgeFactory(baseline_context_getter,
                                     NetworkTimeUpdateCallback(),
                                     factory_cancelation_signal));
@@ -562,10 +562,9 @@ TEST_F(MAYBE_SyncHttpBridgeTest, EarlyAbortFactory) {
 
   // UI Thread: Initialize the HttpBridgeFactory.  The next step would be to
   // post a task to SBH::Core to have it initialized.
-  scoped_ptr<syncer::HttpBridgeFactory> factory(
-      new HttpBridgeFactory(baseline_context_getter.get(),
-                            NetworkTimeUpdateCallback(),
-                            &release_request_context_signal));
+  std::unique_ptr<syncer::HttpBridgeFactory> factory(new HttpBridgeFactory(
+      baseline_context_getter.get(), NetworkTimeUpdateCallback(),
+      &release_request_context_signal));
 
   // UI Thread: A very early shutdown request arrives and executes on the UI
   // thread before the posted sync thread task is run.