ash: Fix system tray avatar not updated regression

ash/common/system/user/rounded_image_view.cc

Index: ash/common/system/user/rounded_image_view.cc
diff --git a/ash/common/system/user/rounded_image_view.cc b/ash/common/system/user/rounded_image_view.cc
index cef81547ea855374a7c7a8f40b53f38f39272903..e708279c2142a5f59dffcae0d80636c43896e46e 100644
--- a/ash/common/system/user/rounded_image_view.cc
+++ b/ash/common/system/user/rounded_image_view.cc
@@ -20,14 +20,13 @@ RoundedImageView::RoundedImageView(int corner_radius) {
 
 RoundedImageView::~RoundedImageView() {}
 
-void RoundedImageView::SetImage(const gfx::ImageSkia& img,
+void RoundedImageView::SetImage(const gfx::ImageSkia& image,
                                 const gfx::Size& size) {
-  image_ = img;
   image_size_ = size;
 
   // Try to get the best image quality for the avatar.
   resized_ = gfx::ImageSkiaOperations::CreateResizedImage(
-      image_, skia::ImageOperations::RESIZE_BEST, size);
+      image, skia::ImageOperations::RESIZE_BEST, size);
   if (GetWidget() && visible()) {
     PreferredSizeChanged();
     SchedulePaint();