RAPPOR implementation

chrome/browser/prefs/pref_metrics_service.cc

 // Copyright 2013 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/prefs/pref_metrics_service.h"
 
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/json/json_string_value_serializer.h"
 #include "base/metrics/histogram.h"
@@ skipping 10 matching lines @@
 #include "chrome/browser/prefs/pref_service_syncable.h"
 #include "chrome/browser/prefs/session_startup_pref.h"
 #include "chrome/browser/prefs/synced_pref_change_registrar.h"
 #include "chrome/browser/profiles/incognito_helpers.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/search_engines/template_url_prepopulate_data.h"
 #include "chrome/browser/ui/tabs/pinned_tab_codec.h"
 #include "chrome/common/chrome_switches.h"
 #include "chrome/common/pref_names.h"
 #include "components/browser_context_keyed_service/browser_context_dependency_manager.h"
+#include "components/rappor/rappor_service.h"
+#include "components/rappor/rappor_utils.h"
 #include "crypto/hmac.h"
 #include "grit/browser_resources.h"
 #include "net/base/registry_controlled_domains/registry_controlled_domain.h"
 #include "ui/base/resource/resource_bundle.h"
 
 namespace {
 
 const int kSessionStartupPrefValueMax = SessionStartupPref::kPrefValueMax;
 
 #if defined(OS_ANDROID)
@@ skipping 23 matching lines @@
 #if !defined(OS_ANDROID)
   prefs::kPinnedTabs,
 #else
   kUnregisteredPreference,
 #endif
   prefs::kExtensionKnownDisabled,
 };
 
 const size_t kSHA256DigestSize = 32;
 
+const rappor::RapporParameters kHomePageRapporParameters = {
+    "Settings.HomePage", 16 /* Bloom filter size bytes */,
+    4 /* Bloom filter hash count */,
+    rappor::PROBABILITY_75 /* Fake data probability */,
+    rappor::PROBABILITY_50 /* Fake one probability */,
+    rappor::PROBABILITY_75 /* One coin probability */,
+    rappor::PROBABILITY_50 /* Zero coin probability */
+};
+
 }  // namespace
 
 PrefMetricsService::PrefMetricsService(Profile* profile)
     : profile_(profile),
       prefs_(profile_->GetPrefs()),
       local_state_(g_browser_process->local_state()),
       profile_name_(profile_->GetPath().AsUTF8Unsafe()),
       tracked_pref_paths_(kTrackedPrefs),
       tracked_pref_path_count_(arraysize(kTrackedPrefs)),
       checked_tracked_prefs_(false),
@@ skipping 60 matching lines @@
   // consist of a search box that sends to known TLD+1 Y) and false positives
   // (pages that share a TLD+1 with a known engine but aren't actually search
   // pages, e.g. plus.google.com).
   if (!home_page_is_ntp) {
     GURL homepage_url(prefs_->GetString(prefs::kHomePage));
     if (homepage_url.is_valid()) {
       UMA_HISTOGRAM_ENUMERATION(
           "Settings.HomePageEngineType",
           TemplateURLPrepopulateData::GetEngineType(homepage_url),
           SEARCH_ENGINE_MAX);
+      std::vector<std::string> url_parts;
+      rappor::GetUrlParts(homepage_url, &url_parts);

[Alexei Svitkine (slow), 2014/01/09 19:23:09]

I think the service should just have a RecordURL() method that does this
internally, so the caller doesn't need this extra logic. (Then rappor_utils can
go away.)

[Steven Holte, 2014/01/09 22:03:01]

Done.

+      g_browser_process->rappor_service()->RecordSamples(
+          kHomePageRapporParameters, url_parts);
     }
   }
 
   int restore_on_startup = prefs_->GetInteger(prefs::kRestoreOnStartup);
   UMA_HISTOGRAM_ENUMERATION("Settings.StartupPageLoadSettings",
                             restore_on_startup, kSessionStartupPrefValueMax);
   if (restore_on_startup == SessionStartupPref::kPrefValueURLs) {
     const ListValue* url_list = prefs_->GetList(prefs::kURLsToRestoreOnStartup);
     UMA_HISTOGRAM_CUSTOM_COUNTS("Settings.StartupPageLoadURLs",
                                 url_list->GetSize(), 1, 50, 20);
@@ skipping 306 matching lines @@
 }
 
 bool PrefMetricsService::Factory::ServiceIsNULLWhileTesting() const {
   return false;
 }
 
 content::BrowserContext* PrefMetricsService::Factory::GetBrowserContextToUse(
     content::BrowserContext* context) const {
   return chrome::GetBrowserContextRedirectedInIncognito(context);
 }