cheets: remove setWallpaper from ArcIntentHelper.

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

Index: chrome/browser/chromeos/arc/wallpaper/arc_wallpaper_service.cc
diff --git a/chrome/browser/chromeos/arc/wallpaper/arc_wallpaper_service.cc b/chrome/browser/chromeos/arc/wallpaper/arc_wallpaper_service.cc
index 5aaab3ae7fc76f532476a9aafa821be3d4cc23a7..ce6e3c6bebefc13fd3761897be99f6d113423af3 100644
--- a/chrome/browser/chromeos/arc/wallpaper/arc_wallpaper_service.cc
+++ b/chrome/browser/chromeos/arc/wallpaper/arc_wallpaper_service.cc
@@ -107,11 +107,10 @@ void ArcWallpaperService::OnInstanceClosed() {
     wc->RemoveObserver(this);
 }
 
-void ArcWallpaperService::SetWallpaper(const std::vector<uint8_t>& png_data) {
+void ArcWallpaperService::SetWallpaper(const std::vector<uint8_t>& data) {
   DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
   ImageDecoder::Cancel(this);
-  ImageDecoder::StartWithOptions(this, png_data, ImageDecoder::ROBUST_PNG_CODEC,
-                                 true);
+  ImageDecoder::StartWithOptions(this, data, ImageDecoder::DEFAULT_CODEC, true);
 }
 
 void ArcWallpaperService::GetWallpaper(const GetWallpaperCallback& callback) {