Experience sampling instrumentation for dangerous downloads warnings

chrome/browser/download/download_danger_prompt.cc

Index: chrome/browser/download/download_danger_prompt.cc
diff --git a/chrome/browser/download/download_danger_prompt.cc b/chrome/browser/download/download_danger_prompt.cc
index 4ec23bcc5304612a9b40624391a2df7e68b20c76..9ade8607c1ef745854187c6d1f3b48fe40a6e135 100644
--- a/chrome/browser/download/download_danger_prompt.cc
+++ b/chrome/browser/download/download_danger_prompt.cc
@@ -9,6 +9,7 @@
 #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"
@@ -17,8 +18,13 @@
 #include "grit/generated_resources.h"
 #include "ui/base/l10n/l10n_util.h"
 
+using extensions::ExperienceSamplingEvent;
+
 namespace {
 
+// Constant for the Experience Sampling instrumentation.
+const char kEventName[] = "download_danger_prompt";
+
 // 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.
@@ -56,6 +62,8 @@ class DownloadDangerPromptImpl : public DownloadDangerPrompt,
   bool show_context_;
   OnDone done_;
 
+  scoped_ptr<ExperienceSamplingEvent> sampling_event_;
+
   DISALLOW_COPY_AND_ASSIGN(DownloadDangerPromptImpl);
 };
 
@@ -71,6 +79,14 @@ DownloadDangerPromptImpl::DownloadDangerPromptImpl(
   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(
+      kEventName,
+      download->GetURL(),
+      download->GetReferrerUrl(),
+      download->GetBrowserContext()));
 }
 
 DownloadDangerPromptImpl::~DownloadDangerPromptImpl() {
@@ -203,14 +219,20 @@ base::string16 DownloadDangerPromptImpl::GetCancelButtonTitle() {
 }
 
 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);
 }