arc: Convert more Mojo types to STL

chrome/browser/chromeos/arc/wallpaper/arc_wallpaper_service.h

Index: chrome/browser/chromeos/arc/wallpaper/arc_wallpaper_service.h
diff --git a/chrome/browser/chromeos/arc/wallpaper/arc_wallpaper_service.h b/chrome/browser/chromeos/arc/wallpaper/arc_wallpaper_service.h
index f437764bdcf6926983e8a0278394fb9b4a3e204f..107779cb248fbea6c3bf6acb58c286431dd17bea 100644
--- a/chrome/browser/chromeos/arc/wallpaper/arc_wallpaper_service.h
+++ b/chrome/browser/chromeos/arc/wallpaper/arc_wallpaper_service.h
@@ -6,6 +6,7 @@
 #define CHROME_BROWSER_CHROMEOS_ARC_WALLPAPER_ARC_WALLPAPER_SERVICE_H_
 
 #include <stdint.h>
+#include <vector>
 
 #include "ash/common/wallpaper/wallpaper_controller_observer.h"
 #include "base/macros.h"
@@ -37,7 +38,7 @@ class ArcWallpaperService
   // mojom::WallpaperHost overrides.
   // TODO(muyuanli): change callback prototype when use_new_wrapper_types is
   // updated and merge them with the functions below.
-  void SetWallpaper(mojo::Array<uint8_t> png_data) override;
+  void SetWallpaper(const std::vector<uint8_t>& png_data) override;
   void GetWallpaper(const GetWallpaperCallback& callback) override;
 
   // ImageDecoder::ImageRequest implementation.