Make the minimized home card not overlap activities on Athena

athena/screen/public/screen_manager.h

Index: athena/screen/public/screen_manager.h
diff --git a/athena/screen/public/screen_manager.h b/athena/screen/public/screen_manager.h
index 82ad85592bf7067f2b44a9bbddb58f9ac7b17d7f..307f006a350aa174e2baf25406162a06065ed8b1 100644
--- a/athena/screen/public/screen_manager.h
+++ b/athena/screen/public/screen_manager.h
@@ -15,6 +15,7 @@ class Window;
 
 namespace gfx {
 class ImageSkia;
+class Insets;
 }
 
 namespace ui {
@@ -26,6 +27,7 @@ class FocusRules;
 }
 
 namespace athena {
+class ScreenManagerDelegate;
 
 // Mananges basic UI components on the screen such as background, and provide
 // API for other UI components, such as window manager, home card, to
@@ -48,12 +50,16 @@ class ATHENA_EXPORT ScreenManager {
 
   // Creates, returns and deletes the singleton object of the ScreenManager
   // implementation.
-  static ScreenManager* Create(aura::Window* root);
+  static ScreenManager* Create(ScreenManagerDelegate* delegate,
+                               aura::Window* root);
   static ScreenManager* Get();
   static void Shutdown();
 
   virtual ~ScreenManager() {}
 
+  // Sets the screen's work area insets.
+  virtual void SetWorkAreaInsets(const gfx::Insets& insets) = 0;
+
   // Creates the container window that is used when creating a normal
   // widget without specific parent.
   virtual aura::Window* CreateDefaultContainer(