Replace scoped_ptr with std::unique_ptr in //ui

ui/snapshot/snapshot_async.h

Index: ui/snapshot/snapshot_async.h
diff --git a/ui/snapshot/snapshot_async.h b/ui/snapshot/snapshot_async.h
index 1c53db9b73469f6eb0a98a00f1ec8c3159a2f53b..364f76c26d9fb88d9bf89aee28062e917f0207d8 100644
--- a/ui/snapshot/snapshot_async.h
+++ b/ui/snapshot/snapshot_async.h
@@ -5,8 +5,9 @@
 #ifndef UI_SNAPSHOT_SNAPSHOT_ASYNC_H_
 #define UI_SNAPSHOT_SNAPSHOT_ASYNC_H_
 
+#include <memory>
+
 #include "base/macros.h"
-#include "base/memory/scoped_ptr.h"
 #include "cc/output/copy_output_result.h"
 #include "ui/snapshot/snapshot.h"
 
@@ -28,12 +29,12 @@ class SnapshotAsync {
       const GrabWindowSnapshotAsyncCallback& callback,
       const gfx::Size& target_size,
       scoped_refptr<base::TaskRunner> background_task_runner,
-      scoped_ptr<cc::CopyOutputResult> result);
+      std::unique_ptr<cc::CopyOutputResult> result);
 
   static void EncodeCopyOutputResult(
       const GrabWindowSnapshotAsyncPNGCallback& callback,
       scoped_refptr<base::TaskRunner> background_task_runner,
-      scoped_ptr<cc::CopyOutputResult> result);
+      std::unique_ptr<cc::CopyOutputResult> result);
 
  private:
   DISALLOW_IMPLICIT_CONSTRUCTORS(SnapshotAsync);