Added views::ViewModelT<T>, a type-safe template version of ViewModel.

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 dbb74cf8d50c754e8ff572acad645d529abe3235..5e88d01d750646a1835a3848fcdeeb4996c464b8 100644
--- a/ui/app_list/views/contents_view.h
+++ b/ui/app_list/views/contents_view.h
@@ -14,15 +14,12 @@
 #include "ui/app_list/pagination_model.h"
 #include "ui/app_list/pagination_model_observer.h"
 #include "ui/views/view.h"
+#include "ui/views/view_model.h"
 
 namespace gfx {
 class Rect;
 }
 
-namespace views {
-class ViewModel;
-}
-
 namespace app_list {
 
 class AppsGridView;
@@ -160,7 +157,7 @@ class APP_LIST_EXPORT ContentsView : public views::View,
   // Sibling view, owned by |app_list_main_view_|.
   ContentsSwitcherView* contents_switcher_view_;
 
-  scoped_ptr<views::ViewModel> view_model_;
+  scoped_ptr<views::ViewModel<views::View>> view_model_;
   // Maps NamedPage onto |view_model_| indices.
   std::map<NamedPage, int> named_page_to_view_;