Move avatar holder code to ash

ash/frame/frame_util.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_FRAME_FRAME_UTIL_H_
+#define ASH_FRAME_FRAME_UTIL_H_
+
+#include "ash/ash_export.h"
+
+namespace content {
+class BrowserContext;
+}
+
+namespace gfx {
+class Image;
+}
+
+namespace ash {
+
+// Returns the avatar image to be used in the title bar
+// for the user associated witht the |context|.
+ASH_EXPORT gfx::Image GetAvatarImageForContext(
+    content::BrowserContext* context);
+
+}  // namespace ash
+
+#endif  // ASH_FRAME_FRAME_UTIL_H_
+