Convert //sync from scoped_ptr to std::unique_ptr

sync/internal_api/sync_context_proxy_impl.cc

Index: sync/internal_api/sync_context_proxy_impl.cc
diff --git a/sync/internal_api/sync_context_proxy_impl.cc b/sync/internal_api/sync_context_proxy_impl.cc
index 0f1fd221917037cc33ac58fa4fbace510200956e..27e63577ab0933742a106c5f3fa6e123fd42f08a 100644
--- a/sync/internal_api/sync_context_proxy_impl.cc
+++ b/sync/internal_api/sync_context_proxy_impl.cc
@@ -23,7 +23,7 @@ SyncContextProxyImpl::~SyncContextProxyImpl() {
 
 void SyncContextProxyImpl::ConnectTypeToSync(
     syncer::ModelType type,
-    scoped_ptr<ActivationContext> activation_context) {
+    std::unique_ptr<ActivationContext> activation_context) {
   VLOG(1) << "ConnectTypeToSync: " << ModelTypeToString(type);
   sync_task_runner_->PostTask(
       FROM_HERE,
@@ -37,8 +37,8 @@ void SyncContextProxyImpl::Disconnect(syncer::ModelType type) {
       base::Bind(&SyncContext::DisconnectSyncWorker, sync_context_, type));
 }
 
-scoped_ptr<SyncContextProxy> SyncContextProxyImpl::Clone() const {
-  return scoped_ptr<SyncContextProxy>(
+std::unique_ptr<SyncContextProxy> SyncContextProxyImpl::Clone() const {
+  return std::unique_ptr<SyncContextProxy>(
       new SyncContextProxyImpl(sync_task_runner_, sync_context_));
 }