ui: Cleanup class/struct forward declarations

chrome/browser/media/webrtc/window_icon_util_chromeos.cc

Index: chrome/browser/media/webrtc/window_icon_util_chromeos.cc
diff --git a/chrome/browser/media/webrtc/window_icon_util_chromeos.cc b/chrome/browser/media/webrtc/window_icon_util_chromeos.cc
index 530f013a30d7fd5c3c8f3074509224d4783fa0fe..9c9130fafce47d08f45e7891f2b18b71084da2cb 100644
--- a/chrome/browser/media/webrtc/window_icon_util_chromeos.cc
+++ b/chrome/browser/media/webrtc/window_icon_util_chromeos.cc
@@ -14,8 +14,8 @@ gfx::ImageSkia GetWindowIcon(content::DesktopMediaID id) {
   if (!window)
     return gfx::ImageSkia();
 
-  gfx::ImageSkia* image = window->GetProperty(aura::client::kWindowIconKey);
-  if (!image)
-    image = window->GetProperty(aura::client::kAppIconKey);
-  return image ? *image : gfx::ImageSkia();
+  const gfx::ImageSkia* icon_image_ptr =
+      window->GetProperty(aura::client::kWindowIconKey);
+
+  return icon_image_ptr ? *icon_image_ptr : gfx::ImageSkia();
 }