Display Window Icon In Picker UI

chrome/browser/media/window_icon_util_chromeos.cc

+// Copyright 2016 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.
+
+#include "chrome/browser/media/window_icon_util.h"
+
+#include "content/public/browser/desktop_media_id.h"
+#include "ui/aura/client/aura_constants.h"
+#include "ui/aura/window.h"
+
+gfx::ImageSkia GetWindowIcon(content::DesktopMediaID id) {
+  DCHECK_EQ(content::DesktopMediaID::TYPE_WINDOW, id.type);
+  aura::Window* window = content::DesktopMediaID::GetAuraWindowById(id);
+  if (!window)
+    return gfx::ImageSkia();
+
+  const gfx::ImageSkia* icon_image_ptr =
+      window->GetProperty(aura::client::kWindowIconKey);
+
+  return icon_image_ptr ? *icon_image_ptr : gfx::ImageSkia();
+}