Add appIconMask to notification API

ui/message_center/views/small_image_mask.h

Index: ui/message_center/views/small_image_mask.h
diff --git a/ui/message_center/views/small_image_mask.h b/ui/message_center/views/small_image_mask.h
new file mode 100644
index 0000000000000000000000000000000000000000..c6c14f0f50a4a5f3fa657f4b91b18f0d5046ffc5
--- /dev/null
+++ b/ui/message_center/views/small_image_mask.h
@@ -0,0 +1,26 @@
+// 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 UI_MESSAGE_CENTER_SMALL_IMAGE_MASK_H_
+#define UI_MESSAGE_CENTER_SMALL_IMAGE_MASK_H_
+
+#include "third_party/skia/include/core/SkBitmap.h"
+#include "ui/gfx/image/image.h"
+#include "ui/gfx/image/image_skia.h"
+
+const gfx::ImageSkia GetMaskedSmallImage(const gfx::ImageSkia& small_image);
+
+const gfx::ImageSkia CreateImage(int width,
+                                 int height,
+                                 int red,
+                                 int green,
+                                 int blue);
+
+const SkBitmap CreateBitmap(int width,
+                            int height,
+                            int red,
+                            int green,
+                            int blue);
+
+#endif