Experience sampling instrumentation for dangerous downloads warnings

chrome/browser/download/download_danger_prompt.cc

 // 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.
 
 #include "chrome/browser/download/download_danger_prompt.h"
 
 #include "base/bind.h"
 #include "base/strings/utf_string_conversions.h"
 #include "chrome/browser/chrome_notification_types.h"
 #include "chrome/browser/download/chrome_download_manager_delegate.h"
 #include "chrome/browser/download/download_stats.h"
+#include "chrome/browser/extensions/api/experience_sampling_private/experience_sampling.h"
 #include "chrome/browser/ui/tab_modal_confirm_dialog.h"
 #include "chrome/browser/ui/tab_modal_confirm_dialog_delegate.h"
 #include "content/public/browser/download_danger_type.h"
 #include "content/public/browser/download_item.h"
 #include "grit/chromium_strings.h"
 #include "grit/generated_resources.h"
 #include "ui/base/l10n/l10n_util.h"
 
+using extensions::ExperienceSamplingEvent;
+
 namespace {
 
 // TODO(wittman): Create a native web contents modal dialog implementation of
 // this dialog for non-Views platforms, to support bold formatting of the
 // message lead.
 
 // Implements DownloadDangerPrompt using a TabModalConfirmDialog.
 class DownloadDangerPromptImpl : public DownloadDangerPrompt,
                                  public content::DownloadItem::Observer,
                                  public TabModalConfirmDialogDelegate {
@@ skipping 19 matching lines @@
   virtual void OnAccepted() OVERRIDE;
   virtual void OnCanceled() OVERRIDE;
   virtual void OnClosed() OVERRIDE;
 
   void RunDone(Action action);
 
   content::DownloadItem* download_;
   bool show_context_;
   OnDone done_;
 
+  scoped_ptr<ExperienceSamplingEvent> sampling_event_;
+
   DISALLOW_COPY_AND_ASSIGN(DownloadDangerPromptImpl);
 };
 
 DownloadDangerPromptImpl::DownloadDangerPromptImpl(
     content::DownloadItem* download,
     content::WebContents* web_contents,
     bool show_context,
     const OnDone& done)
     : TabModalConfirmDialogDelegate(web_contents),
       download_(download),
       show_context_(show_context),
       done_(done) {
   DCHECK(!done_.is_null());
   download_->AddObserver(this);
   RecordOpenedDangerousConfirmDialog(download_->GetDangerType());
+
+  // ExperienceSampling: A malicious download warning is being shown to the
+  // user, so we start a new SamplingEvent and track it.
+  sampling_event_.reset(new ExperienceSamplingEvent(
+      ExperienceSamplingEvent::kDownloadDangerPrompt,
+      download->GetURL(),
+      download->GetReferrerUrl(),
+      download->GetBrowserContext()));
 }
 
 DownloadDangerPromptImpl::~DownloadDangerPromptImpl() {
   // |this| might be deleted without invoking any callbacks. E.g. pressing Esc
   // on GTK or if the user navigates away from the page showing the prompt.
   RunDone(DISMISS);
 }
 
 void DownloadDangerPromptImpl::InvokeActionForTesting(Action action) {
   switch (action) {
@@ skipping 112 matching lines @@
     case content::DOWNLOAD_DANGER_TYPE_DANGEROUS_HOST:
     case content::DOWNLOAD_DANGER_TYPE_POTENTIALLY_UNWANTED: {
       return l10n_util::GetStringUTF16(IDS_CONFIRM_CANCEL_AGAIN_MALICIOUS);
     }
     default:
       return l10n_util::GetStringUTF16(IDS_CANCEL);
   }
 }
 
 void DownloadDangerPromptImpl::OnAccepted() {
+  // ExperienceSampling: User proceeded through the warning.
+  sampling_event_->CreateUserDecisionEvent(ExperienceSamplingEvent::kProceed);
   RunDone(ACCEPT);
 }
 
 void DownloadDangerPromptImpl::OnCanceled() {
+  // ExperienceSampling: User canceled the warning.
+  sampling_event_->CreateUserDecisionEvent(ExperienceSamplingEvent::kDeny);
   RunDone(CANCEL);
 }
 
 void DownloadDangerPromptImpl::OnClosed() {
+  // ExperienceSampling: User canceled the warning.
+  sampling_event_->CreateUserDecisionEvent(ExperienceSamplingEvent::kDeny);
   RunDone(DISMISS);
 }
 
 void DownloadDangerPromptImpl::RunDone(Action action) {
   // Invoking the callback can cause the download item state to change or cause
   // the constrained window to close, and |callback| refers to a member
   // variable.
   OnDone done = done_;
   done_.Reset();
   if (download_ != NULL) {
@@ skipping 13 matching lines @@
     content::WebContents* web_contents,
     bool show_context,
     const OnDone& done) {
   DownloadDangerPromptImpl* prompt = new DownloadDangerPromptImpl(
       item, web_contents, show_context, done);
   // |prompt| will be deleted when the dialog is done.
   TabModalConfirmDialog::Create(prompt, web_contents);
   return prompt;
 }
 #endif