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

athena/home/public/home_card.h

Index: athena/home/public/home_card.h
diff --git a/athena/home/public/home_card.h b/athena/home/public/home_card.h
index 795e8ffa58b55ea2fc121f90c2a6dbdde539c5ca..631c74bf2f8a81cbab22f849dfb538910cef1a2a 100644
--- a/athena/home/public/home_card.h
+++ b/athena/home/public/home_card.h
@@ -11,6 +11,10 @@ namespace app_list {
 class SearchProvider;
 }
 
+namespace aura {
+class Window;
+}
+
 namespace gfx {
 class Rect;
 }
@@ -30,6 +34,10 @@ class ATHENA_EXPORT HomeCard {
     // HomeCard is visible smaller at the bottom of the screen as a supplemental
     // widget.
     VISIBLE_BOTTOM,
+
+    // HomeCard is minimized (i.e. a small UI element is displayed on screen
+    // that the user can interact with to bring up the BOTTOM or CENTERED view).
+    VISIBLE_MINIMIZED,
   };
 
   // Creates/deletes/gets the singleton object of the HomeCard
@@ -48,9 +56,14 @@ class ATHENA_EXPORT HomeCard {
   virtual void RegisterSearchProvider(
       app_list::SearchProvider* search_provider) = 0;
 
-  // Called when the virtual keyboard changed has changed to |bounds|.
+  // Called when the virtual keyboard changed has changed to |bounds|. An empty
+  // |bounds| indicates that the virtual keyboard is not visible anymore.
   virtual void UpdateVirtualKeyboardBounds(
       const gfx::Rect& bounds) = 0;
+
+  // Returns the native window for the home-card. Note that the native-window
+  // used for the home-card may be different in different states.
+  virtual aura::Window* GetNativeWindow() = 0;

[oshima, 2014/07/16 19:10:38]

Do you need this here? Can this be in Delegate instead?

[sadrul, 2014/07/16 19:32:58]

Yes! I should've just done that. Done.

 };
 
 }  // namespace athena