Experience sampling instrumentation for dangerous downloads warnings

chrome/browser/ui/cocoa/download/download_item_controller.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.
 
 #import <Cocoa/Cocoa.h>
 
 #include "base/memory/scoped_ptr.h"
 #include "base/time/time.h"
 
 @class ChromeUILocalizer;
 @class DownloadItemCell;
 @class DownloadItemButton;
 class DownloadItemMac;
 class DownloadItemModel;
 class DownloadShelfContextMenuMac;
 @class DownloadShelfController;
 @class GTMWidthBasedTweaker;
 
 namespace content {
 class DownloadItem;
 class PageNavigator;
 }
 
+namespace extensions {
+class ExperienceSamplingEvent;
+}
+
 namespace gfx {
 class FontList;
 }
 
 namespace ui {
 class MenuModel;
 }
 
 // A controller class that manages one download item.
 
@@ skipping 30 matching lines @@
   base::Time creationTime_;
 
   // Default font list to use for text metrics.
   scoped_ptr<gfx::FontList> font_list_;
 
   // The state of this item.
   enum DownoadItemState {
     kNormal,
     kDangerous
   } state_;
+
+  // ExperienceSampling: This tracks dangerous/malicious downloads warning UI
+  // and the user's decisions about it.
+  scoped_ptr<extensions::ExperienceSamplingEvent> sampling_event_;
 };
 
 // Initialize controller for |downloadItem|.
 - (id)initWithDownload:(content::DownloadItem*)downloadItem
                  shelf:(DownloadShelfController*)shelf
              navigator:(content::PageNavigator*)navigator;
 
 // Updates the UI and menu state from |downloadModel|.
 - (void)setStateFromDownload:(DownloadItemModel*)downloadModel;
 
@@ skipping 28 matching lines @@
 - (void)updateToolTip;
 
 // Handling of dangerous downloads
 - (void)clearDangerousMode;
 - (BOOL)isDangerousMode;
 - (IBAction)saveDownload:(id)sender;
 - (IBAction)discardDownload:(id)sender;
 - (IBAction)dismissMaliciousDownload:(id)sender;
 - (IBAction)showContextMenu:(id)sender;
 @end