Implemented system tray UI for new account management.

ash/system/user/rounded_image_view.h

Index: ash/system/user/rounded_image_view.h
diff --git a/ash/system/user/rounded_image_view.h b/ash/system/user/rounded_image_view.h
new file mode 100644
index 0000000000000000000000000000000000000000..5723d3752623420cbb671f7201659b5dd97d16ff
--- /dev/null
+++ b/ash/system/user/rounded_image_view.h
@@ -0,0 +1,55 @@
+// 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_SYSTEM_USER_ROUNDED_IMAGE_VIEW_H_
+#define ASH_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|. If |active_user| is set, the icon will be drawn in
+  // full colors - otherwise it will fade into the background.
+  RoundedImageView(int corner_radius, bool active_user);
+  virtual ~RoundedImageView();
+
+  // 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);
+
+  // Set the radii of the corners independently.
+  void SetCornerRadii(int top_left,
+                      int top_right,
+                      int bottom_right,
+                      int bottom_left);
+
+ private:
+  // Overridden from views::View.
+  virtual gfx::Size GetPreferredSize() OVERRIDE;
+  virtual void OnPaint(gfx::Canvas* canvas) OVERRIDE;
+
+  gfx::ImageSkia image_;
+  gfx::ImageSkia resized_;
+  gfx::Size image_size_;
+  int corner_radius_[4];
+
+  // True if the given user is the active user and the icon should get
+  // painted as active.
+  bool active_user_;
+
+  DISALLOW_COPY_AND_ASSIGN(RoundedImageView);
+};
+
+}  // namespace tray
+}  // namespace ash
+
+#endif  // ASH_SYSTEM_USER_ROUNDED_IMAGE_VIEW_H_