Make the App Info Dialog appear modal

ui/app_list/views/app_list_view.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef UI_APP_LIST_VIEWS_APP_LIST_VIEW_H_
 #define UI_APP_LIST_VIEWS_APP_LIST_VIEW_H_
 
 #include "base/callback.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/observer_list.h"
@@ skipping 58 matching lines @@
       ApplicationDragAndDropHost* drag_and_drop_host);
 
   // Shows the UI when there are no pending icon loads. Otherwise, starts a
   // timer to show the UI when a maximum allowed wait time has expired.
   void ShowWhenReady();
 
   void Close();
 
   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);

[tapted, 2014/05/21 03:40:57]

I'd go for

SetAppListOverlayVisible(bool visible)

makes the callsites more readable when passing true/false (whereas
Show..(false); could anything, e.g. "show but without an animation")

[sashab, 2014/05/22 07:20:21]

Good suggestion. Made the comment simpler as well as a result of this change.

+
   // Returns true if the app list should be centered and in landscape mode.
   bool ShouldCenterWindow() const;
 
   // Overridden from views::View:
   virtual gfx::Size GetPreferredSize() const OVERRIDE;
   virtual void Paint(gfx::Canvas* canvas,
                      const views::CullSet& cull_set) OVERRIDE;
   virtual void OnThemeChanged() OVERRIDE;
 
   // WidgetDelegate overrides:
@@ skipping 53 matching lines @@
       SpeechRecognitionState new_state) OVERRIDE;
 
   SigninDelegate* GetSigninDelegate();
 
   scoped_ptr<AppListViewDelegate> delegate_;
 
   AppListMainView* app_list_main_view_;
   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_;
 
   // For UMA and testing. If non-null, triggered when the app list is painted.
   base::Closure next_paint_callback_;
 
   DISALLOW_COPY_AND_ASSIGN(AppListView);
 };
 
 }  // namespace app_list
 
 #endif  // UI_APP_LIST_VIEWS_APP_LIST_VIEW_H_