athena: Add a minimized state for the home-card.

athena/wm/window_manager_impl.cc

Index: athena/wm/window_manager_impl.cc
diff --git a/athena/wm/window_manager_impl.cc b/athena/wm/window_manager_impl.cc
index 589da390733ec1ecf3999c24c0b16278b8b5d35c..383f4bec619579d4d077a24e7ed4fcdd218f9a32 100644
--- a/athena/wm/window_manager_impl.cc
+++ b/athena/wm/window_manager_impl.cc
@@ -4,6 +4,7 @@
 
 #include "athena/wm/public/window_manager.h"
 
+#include "athena/home/public/home_card.h"
 #include "athena/screen/public/screen_manager.h"
 #include "athena/wm/window_overview_mode.h"
 #include "base/logging.h"
@@ -37,6 +38,8 @@ class WindowManagerImpl : public WindowManager,
     CHECK_EQ(container_.get(), window->parent());
     container_->StackChildAtTop(window);
     overview_.reset();
+
+    HomeCard::Get()->SetState(HomeCard::VISIBLE_MINIMIZED);
   }
 
   // aura::WindowObserver
@@ -148,4 +151,10 @@ void WindowManager::Shutdown() {
   DCHECK(!instance);
 }
 
+// static
+WindowManager* WindowManager::GetInstance() {
+  DCHECK(instance);
+  return instance;
+}
+
 }  // namespace athena