Convert //chrome/browser/ui from scoped_ptr to std::unique_ptr

chrome/browser/ui/app_list/arc/arc_app_icon.h

Index: chrome/browser/ui/app_list/arc/arc_app_icon.h
diff --git a/chrome/browser/ui/app_list/arc/arc_app_icon.h b/chrome/browser/ui/app_list/arc/arc_app_icon.h
index c08d155340549c91c213b5ed151df23a150550b9..6b523d3c65190a947addca20ce96443c522e0020 100644
--- a/chrome/browser/ui/app_list/arc/arc_app_icon.h
+++ b/chrome/browser/ui/app_list/arc/arc_app_icon.h
@@ -82,10 +82,10 @@ class ArcAppIcon {
   struct ReadResult;
 
   void RequestIcon(ui::ScaleFactor scale_factor);
-  static scoped_ptr<ArcAppIcon::ReadResult> ReadOnFileThread(
+  static std::unique_ptr<ArcAppIcon::ReadResult> ReadOnFileThread(
       ui::ScaleFactor scale_factor,
       const base::FilePath& path);
-  void OnIconRead(scoped_ptr<ArcAppIcon::ReadResult> read_result);
+  void OnIconRead(std::unique_ptr<ArcAppIcon::ReadResult> read_result);
   void Update(const gfx::ImageSkia* image);
   void DiscardDecodeRequest(DecodeRequest* request);