Convert //sync from scoped_ptr to std::unique_ptr

sync/internal_api/public/sync_context_proxy.h

Index: sync/internal_api/public/sync_context_proxy.h
diff --git a/sync/internal_api/public/sync_context_proxy.h b/sync/internal_api/public/sync_context_proxy.h
index f2eff7e13cd9af5a206d18ca767de2713ae203ce..e84241f4b9256011d5725b9c072c183d2e9a7d78 100644
--- a/sync/internal_api/public/sync_context_proxy.h
+++ b/sync/internal_api/public/sync_context_proxy.h
@@ -5,7 +5,8 @@
 #ifndef SYNC_INTERNAL_API_PUBLIC_SYNC_CONTEXT_PROXY_H_
 #define SYNC_INTERNAL_API_PUBLIC_SYNC_CONTEXT_PROXY_H_
 
-#include "base/memory/scoped_ptr.h"
+#include <memory>
+
 #include "sync/internal_api/public/base/model_type.h"
 
 namespace syncer_v2 {
@@ -22,7 +23,7 @@ class SYNC_EXPORT SyncContextProxy {
   // Attempts to connect a non-blocking type to the sync context.
   virtual void ConnectTypeToSync(
       syncer::ModelType type,
-      scoped_ptr<ActivationContext> activation_context) = 0;
+      std::unique_ptr<ActivationContext> activation_context) = 0;
 
   // Tells the syncer that we're no longer interested in syncing this type.
   //
@@ -32,7 +33,7 @@ class SYNC_EXPORT SyncContextProxy {
   virtual void Disconnect(syncer::ModelType type) = 0;
 
   // Creates a clone of this SyncContextProxy.
-  virtual scoped_ptr<SyncContextProxy> Clone() const = 0;
+  virtual std::unique_ptr<SyncContextProxy> Clone() const = 0;
 };
 
 }  // namespace syncer_v2