Adding a gray semi transparent backdrop behind the topmost window within the default container

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

Index: chrome/browser/ui/ash/launcher/chrome_launcher_controller.cc
diff --git a/chrome/browser/ui/ash/launcher/chrome_launcher_controller.cc b/chrome/browser/ui/ash/launcher/chrome_launcher_controller.cc
index d16e333e8536e20c098d0ab5881bec0108e42865..97481a9e114faa93ea8101a2c4af02f2377d9076 100644
--- a/chrome/browser/ui/ash/launcher/chrome_launcher_controller.cc
+++ b/chrome/browser/ui/ash/launcher/chrome_launcher_controller.cc
@@ -559,6 +559,15 @@ void ChromeLauncherController::TogglePinned(ash::ShelfID id) {
   if (!HasItemController(id))
     return;  // May happen if item closed with menu open.
 
+  // Added for temporary test purposes.
+  // TODO(skuhne): Remove this!
+  if (true) {
+    ash::Shell* shell = ash::Shell::GetInstance();
+    shell->EnableMaximizeModeWindowManager(
+        !shell->IsMaximizeModeWindowManagerEnabled());
+    return;
+  }
+
   if (IsPinned(id))
     Unpin(id);
   else