Add Rappor metrics for Safe Browsing and SSL interstitials.

chrome/browser/interstitials/security_interstitial_metrics_helper.h

Index: chrome/browser/interstitials/security_interstitial_metrics_helper.h
diff --git a/chrome/browser/interstitials/security_interstitial_metrics_helper.h b/chrome/browser/interstitials/security_interstitial_metrics_helper.h
new file mode 100644
index 0000000000000000000000000000000000000000..1808852bc9872e1657eb329fc5e86a2e7286a537
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+++ b/chrome/browser/interstitials/security_interstitial_metrics_helper.h
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+// Copyright (c) 2014 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 CHROME_BROWSER_INTERSTITIALS_SECURITY_INTERSTITIAL_METRICS_HELPER_H_
+#define CHROME_BROWSER_INTERSTITIALS_SECURITY_INTERSTITIAL_METRICS_HELPER_H_
+
+#include <string>
+
+#include "base/task/cancelable_task_tracker.h"
+#include "base/time/time.h"
+#include "url/gurl.h"
+
+namespace content {
+class WebContents;
+}
+
+namespace extensions {
+class ExperienceSamplingEvent;
+}
+
+// Most of the security interstitials share a common layout and set of
+// choices. SecurityInterstitialMetricsHelper is intended to help the security
+// interstitials record user choices in a common way via METRICS histograms
+// and RAPPOR metrics.
+class SecurityInterstitialMetricsHelper {
+ public:
+  // These enums are used for histograms.  Don't reorder, delete, or insert
+  // elements. New elements should be added at the end (right before the max).
+  enum SecurityInterstitialDecision {
+    SHOW,
+    PROCEED,
+    DONT_PROCEED,
+    PROCEEDING_DISABLED,
+    MAX_DECISION
+  };
+  enum SecurityInterstitialInteraction {
+    TOTAL_VISITS,
+    SHOW_ADVANCED,
+    SHOW_PRIVACY_POLICY,
+    SHOW_DIAGNOSTIC,
+    SHOW_LEARN_MORE,
+    RELOAD,
+    OPEN_TIME_SETTINGS,
+    MAX_INTERACTION
+  };
+
+  enum RapporReporting {
+    REPORT_RAPPOR,
+    SKIP_RAPPOR,
+  };
+
+  // Args:
+  //   url: URL of page that triggered the interstitial. Only origin is used.
+  //   uma_prefix: Histogram prefix for UMA.
+  //               examples: "phishing", "ssl_overridable"
+  //   rappor_prefix: Metric prefix for Rappor.
+  //               examples: "phishing", "ssl"
+  //   rappor_reporting: Used to skip rappor rapporting if desired.
+  //   sampling_event_name: Event name for Experience Sampling.
+  //                        e.g. "phishing_interstitial_"
+  SecurityInterstitialMetricsHelper(content::WebContents* web_contents,
+                                    const GURL& url,
+                                    const std::string& uma_prefix,
+                                    const std::string& rappor_prefix,
+                                    RapporReporting rappor_reporting,
+                                    const std::string& sampling_event_name);
+  ~SecurityInterstitialMetricsHelper();
+
+  // Record a user decision or interaction to the appropriate UMA histogram
+  // and potentially in a RAPPOR metric.
+  void RecordUserDecision(SecurityInterstitialDecision decision);
+  void RecordUserInteraction(SecurityInterstitialInteraction interaction);
+
+ private:
+  // Used to query the HistoryService to see if the URL is in history.
+  void OnGotHistoryCount(bool success, int num_visits, base::Time first_visit);
+
+  content::WebContents* web_contents_;
+  const GURL request_url_;
+  const std::string uma_prefix_;
+  const std::string rappor_prefix_;
+  const RapporReporting rappor_reporting_;
+  const std::string sampling_event_name_;
+  int num_visits_;
+  base::CancelableTaskTracker request_tracker_;
+#if defined(ENABLE_EXTENSIONS)
+  scoped_ptr<extensions::ExperienceSamplingEvent> sampling_event_;
+#endif
+
+  DISALLOW_COPY_AND_ASSIGN(SecurityInterstitialMetricsHelper);
+};
+
+#endif  // CHROME_BROWSER_INTERSTITIALS_SECURITY_INTERSTITIAL_METRICS_HELPER_H_