Experimental app list: Added a current page indicator to the launcher.

ui/app_list/views/contents_switcher_view.h

Index: ui/app_list/views/contents_switcher_view.h
diff --git a/ui/app_list/views/contents_switcher_view.h b/ui/app_list/views/contents_switcher_view.h
index 3f1bbf40ea17bdbbf39d4335ba5565ba9e51ab47..38ba280467f8bd0ae04643582744b75cb41b419c 100644
--- a/ui/app_list/views/contents_switcher_view.h
+++ b/ui/app_list/views/contents_switcher_view.h
@@ -6,6 +6,7 @@
 #define UI_APP_LIST_VIEWS_CONTENTS_SWITCHER_VIEW_H_
 
 #include "base/basictypes.h"
+#include "ui/app_list/pagination_model_observer.h"
 #include "ui/views/controls/button/button.h"
 #include "ui/views/view.h"
 
@@ -15,7 +16,9 @@ class ContentsView;
 
 // A view that contains buttons to switch the displayed view in the given
 // ContentsView.
-class ContentsSwitcherView : public views::View, public views::ButtonListener {
+class ContentsSwitcherView : public views::View,
+                             public views::ButtonListener,
+                             public PaginationModelObserver {
  public:
   explicit ContentsSwitcherView(ContentsView* contents_view);
   virtual ~ContentsSwitcherView();
@@ -36,8 +39,16 @@ class ContentsSwitcherView : public views::View, public views::ButtonListener {
   virtual void ButtonPressed(views::Button* sender,
                              const ui::Event& event) OVERRIDE;
 
+  // Overridden from PaginationModelObserver:
+  virtual void TotalPagesChanged() OVERRIDE;
+  virtual void SelectedPageChanged(int old_selected, int new_selected) OVERRIDE;
+  virtual void TransitionStarted() OVERRIDE;
+  virtual void TransitionChanged() OVERRIDE;
+
   ContentsView* contents_view_;  // Owned by views hierarchy.
   views::View* buttons_;         // Owned by views hierarchy.
+  // Stores Views owned by views hierarchy.
+  std::vector<views::View*> page_active_indicators_;
 
   DISALLOW_COPY_AND_ASSIGN(ContentsSwitcherView);
 };