Make the App Info Dialog appear modal

ui/app_list/views/app_list_view.h

Index: ui/app_list/views/app_list_view.h
diff --git a/ui/app_list/views/app_list_view.h b/ui/app_list/views/app_list_view.h
index 5cc91ad7b55507bb0effef2415455e1a9a9d9e61..7648bdf611a6bdfec4f518145d3e2bd41a41898b 100644
--- a/ui/app_list/views/app_list_view.h
+++ b/ui/app_list/views/app_list_view.h
@@ -76,6 +76,11 @@ class APP_LIST_EXPORT AppListView : public views::BubbleDelegateView,
 
   void UpdateBounds();
 
+  // When called with |visible| = true, displays a semi-transparent overlay over
+  // the app list (good for hiding the app list when a modal dialog is being
+  // shown). Call again with |visible| = false to hide.
+  void ShowAppListOverlay(bool visible);
+
   // Returns true if the app list should be centered and in landscape mode.
   bool ShouldCenterWindow() const;
 
@@ -149,6 +154,10 @@ class APP_LIST_EXPORT AppListView : public views::BubbleDelegateView,
   SigninView* signin_view_;
   SpeechView* speech_view_;
 
+  // A semi-transparent white overlay that covers the app list while dialogs are
+  // open.
+  views::View* overlay_view_;
+
   ObserverList<AppListViewObserver> observers_;
   scoped_ptr<HideViewAnimationObserver> animation_observer_;