Changes HomeCard to fullscreen from bottom when typing a query.

athena/home/home_card_impl.cc

Index: athena/home/home_card_impl.cc
diff --git a/athena/home/home_card_impl.cc b/athena/home/home_card_impl.cc
index 9825d9246c7539e2032284a1f4e0bef7e99cb55f..9b2e49f620d73b3601c4596cf5664c462baf65e5 100644
--- a/athena/home/home_card_impl.cc
+++ b/athena/home/home_card_impl.cc
@@ -137,7 +137,8 @@ class HomeCardLayoutManager : public aura::LayoutManager {
 };
 
 // The container view of home card contents of each state.
-class HomeCardView : public views::WidgetDelegateView {
+class HomeCardView : public views::WidgetDelegateView,
+                     public AthenaStartPageView::Observer {
  public:
   HomeCardView(app_list::AppListViewDelegate* view_delegate,
                aura::Window* container,
@@ -149,9 +150,12 @@ class HomeCardView : public views::WidgetDelegateView {
     // the home card.
     // TODO(mukai): make it so after the detailed UI has been fixed.
     main_view_ = new AthenaStartPageView(view_delegate);
+    main_view_->AddObserver(this);
     AddChildView(main_view_);
   }
 
+  virtual ~HomeCardView() { main_view_->RemoveObserver(this); }
+
   void SetStateProgress(HomeCard::State from_state,
                         HomeCard::State to_state,
                         float progress) {
@@ -213,6 +217,12 @@ class HomeCardView : public views::WidgetDelegateView {
     return this;
   }
 
+  // AthenaStartPageView::Observer:
+  virtual void OnLayoutStateChanged(float new_state) override {
+    if (new_state == 1.0f)
+      HomeCard::Get()->SetState(HomeCard::VISIBLE_CENTERED);
+  }
+
   AthenaStartPageView* main_view_;
   scoped_ptr<HomeCardGestureManager> gesture_manager_;
   HomeCardGestureManager::Delegate* gesture_delegate_;