Experimental app list: Change transition animations of top-level pages.

ui/app_list/views/contents_view.h

Index: ui/app_list/views/contents_view.h
diff --git a/ui/app_list/views/contents_view.h b/ui/app_list/views/contents_view.h
index 17ecf9366e29ae6988ce2bacfb969a3303db6ba1..dbb74cf8d50c754e8ff572acad645d529abe3235 100644
--- a/ui/app_list/views/contents_view.h
+++ b/ui/app_list/views/contents_view.h
@@ -15,6 +15,10 @@
 #include "ui/app_list/pagination_model_observer.h"
 #include "ui/views/view.h"
 
+namespace gfx {
+class Rect;
+}
+
 namespace views {
 class ViewModel;
 }
@@ -84,7 +88,8 @@ class APP_LIST_EXPORT ContentsView : public views::View,
   // True if |named_page| is the current active laucher page.
   bool IsNamedPageActive(NamedPage named_page) const;
 
-  // Gets the index of a launcher page in |view_model_|, by NamedPage.
+  // Gets the index of a launcher page in |view_model_|, by NamedPage. Returns
+  // -1 if there is no view for |named_page|.
   int GetPageIndexForNamedPage(NamedPage named_page) const;
 
   int NumLauncherPages() const;
@@ -121,6 +126,10 @@ class APP_LIST_EXPORT ContentsView : public views::View,
   // Invoked when active view is changed.
   void ActivePageChanged(bool show_search_results);
 
+  // Gets the origin (the off-screen resting place) for a given launcher page
+  // with index |page_index|.
+  gfx::Rect GetOffscreenPageBounds(int page_index) const;
+
   // Calculates and sets the bounds for the subviews. If there is currently an
   // animation, this positions the views as appropriate for the current frame.
   void UpdatePageBounds();