Enhance chrome.app.window API with title property

chrome/browser/ui/ash/launcher/chrome_launcher_controller_mus.cc

Index: chrome/browser/ui/ash/launcher/chrome_launcher_controller_mus.cc
diff --git a/chrome/browser/ui/ash/launcher/chrome_launcher_controller_mus.cc b/chrome/browser/ui/ash/launcher/chrome_launcher_controller_mus.cc
index 562dd7cf4282497694c5ea9a995997a8d94b612c..6c88d3ec9c07c899c4508589f3575f21c6683f9a 100644
--- a/chrome/browser/ui/ash/launcher/chrome_launcher_controller_mus.cc
+++ b/chrome/browser/ui/ash/launcher/chrome_launcher_controller_mus.cc
@@ -275,6 +275,12 @@ const std::string& ChromeLauncherControllerMus::GetLaunchIDForShelfID(
   return base::EmptyString();
 }
 
+const std::string& ChromeLauncherControllerMus::GetTitleForShelfID(
+    ash::ShelfID id) {
+  NOTIMPLEMENTED();
+  return base::EmptyString();
+}
+
 void ChromeLauncherControllerMus::OnAppImageUpdated(
     const std::string& app_id,
     const gfx::ImageSkia& image) {