ash: Fix system tray avatar not updated regression

ash/common/system/user/rounded_image_view.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef ASH_COMMON_SYSTEM_USER_ROUNDED_IMAGE_VIEW_H_
 #define ASH_COMMON_SYSTEM_USER_ROUNDED_IMAGE_VIEW_H_
 
 #include "base/macros.h"
 #include "ui/gfx/geometry/size.h"
 #include "ui/gfx/image/image_skia.h"
 #include "ui/views/view.h"
 
 namespace ash {
 namespace tray {
 
 // A custom image view with rounded edges.
 class RoundedImageView : public views::View {
  public:
   // Constructs a new rounded image view with rounded corners of radius
   // |corner_radius|.
   explicit RoundedImageView(int corner_radius);
   ~RoundedImageView() override;
 
   // Set the image that should be displayed. The image contents is copied to the
   // receiver's image.
-  void SetImage(const gfx::ImageSkia& img, const gfx::Size& size);
+  void SetImage(const gfx::ImageSkia& image, const gfx::Size& size);
 
   // Set the radii of the corners independently.
   void SetCornerRadii(int top_left,
                       int top_right,
                       int bottom_right,
                       int bottom_left);
 
   // Overridden from views::View.
   gfx::Size GetPreferredSize() const override;
   void OnPaint(gfx::Canvas* canvas) override;
 
+  // Gets the image painted by RoundedImageView for test.
+  const gfx::ImageSkia& image_for_test() const { return resized_image_; }
+
  private:
-  gfx::ImageSkia image_;
-  gfx::ImageSkia resized_;
+  gfx::ImageSkia resized_image_;
   gfx::Size image_size_;
   int corner_radius_[4];
 
   DISALLOW_COPY_AND_ASSIGN(RoundedImageView);
 };
 
 }  // namespace tray
 }  // namespace ash
 
 #endif  // ASH_COMMON_SYSTEM_USER_ROUNDED_IMAGE_VIEW_H_