chrome/browser/prefs/pref_metrics_service.cc

   1 // Copyright 2013 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "chrome/browser/prefs/pref_metrics_service.h"
   6
   7 #include "base/bind.h"
   8 #include "base/command_line.h"
   9 #include "base/metrics/histogram.h"
  10 #include "base/prefs/pref_registry_simple.h"
  11 #include "base/prefs/pref_service.h"
  12 #include "base/strings/string_number_conversions.h"
  13 #include "chrome/browser/browser_process.h"
  14 #include "chrome/browser/prefs/pref_service_syncable.h"
  15 #include "chrome/browser/prefs/session_startup_pref.h"
  16 #include "chrome/browser/prefs/synced_pref_change_registrar.h"
  17 #include "chrome/browser/profiles/incognito_helpers.h"
  18 #include "chrome/browser/profiles/profile.h"
  19 #include "chrome/browser/search_engines/template_url_service_factory.h"
  20 #include "chrome/browser/ui/tabs/pinned_tab_codec.h"
  21 #include "chrome/common/pref_names.h"
  22 #include "chrome/common/url_constants.h"
  23 #include "components/keyed_service/content/browser_context_dependency_manager.h"
  24 #include "components/rappor/rappor_utils.h"
  25 #include "components/search_engines/template_url_prepopulate_data.h"
  26 #include "content/public/browser/browser_url_handler.h"
  27 #include "crypto/hmac.h"
  28 #include "net/base/registry_controlled_domains/registry_controlled_domain.h"
  29
  30 namespace {
  31
  32 const int kSessionStartupPrefValueMax = SessionStartupPref::kPrefValueMax;
  33
  34 // Record a sample for the Settings.NewTabPage rappor metric.
  35 void SampleNewTabPageURL(Profile* profile) {
  36   GURL ntp_url(chrome::kChromeUINewTabURL);
  37   bool reverse_on_redirect = false;
  38   content::BrowserURLHandler::GetInstance()->RewriteURLIfNecessary(
  39       &ntp_url,
  40       profile,
  41       &reverse_on_redirect);
  42   if (ntp_url.is_valid()) {
  43     rappor::SampleDomainAndRegistryFromGURL(g_browser_process->rappor_service(),
  44                                             "Settings.NewTabPage", ntp_url);
  45   }
  46 }
  47
  48 }  // namespace
  49
  50 PrefMetricsService::PrefMetricsService(Profile* profile)
  51     : profile_(profile),
  52       prefs_(profile_->GetPrefs()),
  53       local_state_(g_browser_process->local_state()),
  54       weak_factory_(this) {
  55   RecordLaunchPrefs();
  56
  57   PrefServiceSyncable* prefs = PrefServiceSyncable::FromProfile(profile_);
  58   synced_pref_change_registrar_.reset(new SyncedPrefChangeRegistrar(prefs));
  59
  60   RegisterSyncedPrefObservers();
  61 }
  62
  63 // For unit testing only.
  64 PrefMetricsService::PrefMetricsService(Profile* profile,
  65                                        PrefService* local_state)
  66     : profile_(profile),
  67       prefs_(profile->GetPrefs()),
  68       local_state_(local_state),
  69       weak_factory_(this) {
  70 }
  71
  72 PrefMetricsService::~PrefMetricsService() {
  73 }
  74
  75 void PrefMetricsService::RecordLaunchPrefs() {
  76   bool show_home_button = prefs_->GetBoolean(prefs::kShowHomeButton);
  77   bool home_page_is_ntp = prefs_->GetBoolean(prefs::kHomePageIsNewTabPage);
  78   UMA_HISTOGRAM_BOOLEAN("Settings.ShowHomeButton", show_home_button);
  79   if (show_home_button) {
  80     UMA_HISTOGRAM_BOOLEAN("Settings.GivenShowHomeButton_HomePageIsNewTabPage",
  81                           home_page_is_ntp);
  82   }
  83
  84   // For non-NTP homepages, see if the URL comes from the same TLD+1 as a known
  85   // search engine.  Note that this is only an approximation of search engine
  86   // use, due to both false negatives (pages that come from unknown TLD+1 X but
  87   // consist of a search box that sends to known TLD+1 Y) and false positives
  88   // (pages that share a TLD+1 with a known engine but aren't actually search
  89   // pages, e.g. plus.google.com).  Additionally, record the TLD+1 of non-NTP
  90   // homepages through the privacy-preserving Rappor service.
  91   if (!home_page_is_ntp) {
  92     GURL homepage_url(prefs_->GetString(prefs::kHomePage));
  93     if (homepage_url.is_valid()) {
  94       UMA_HISTOGRAM_ENUMERATION(
  95           "Settings.HomePageEngineType",
  96           TemplateURLPrepopulateData::GetEngineType(homepage_url),
  97           SEARCH_ENGINE_MAX);
  98       rappor::SampleDomainAndRegistryFromGURL(
  99           g_browser_process->rappor_service(), "Settings.HomePage2",
 100           homepage_url);
 101     }
 102   }
 103
 104   SampleNewTabPageURL(profile_);
 105
 106   int restore_on_startup = prefs_->GetInteger(prefs::kRestoreOnStartup);
 107   UMA_HISTOGRAM_ENUMERATION("Settings.StartupPageLoadSettings",
 108                             restore_on_startup, kSessionStartupPrefValueMax);
 109   if (restore_on_startup == SessionStartupPref::kPrefValueURLs) {
 110     const base::ListValue* url_list =
 111         prefs_->GetList(prefs::kURLsToRestoreOnStartup);
 112     UMA_HISTOGRAM_CUSTOM_COUNTS("Settings.StartupPageLoadURLs",
 113                                 url_list->GetSize(), 1, 50, 20);
 114     // Similarly, check startup pages for known search engine TLD+1s.
 115     std::string url_text;
 116     for (size_t i = 0; i < url_list->GetSize(); ++i) {
 117       if (url_list->GetString(i, &url_text)) {
 118         GURL start_url(url_text);
 119         if (start_url.is_valid()) {
 120           UMA_HISTOGRAM_ENUMERATION(
 121               "Settings.StartupPageEngineTypes",
 122               TemplateURLPrepopulateData::GetEngineType(start_url),
 123               SEARCH_ENGINE_MAX);
 124           if (i == 0) {
 125             rappor::SampleDomainAndRegistryFromGURL(
 126                 g_browser_process->rappor_service(),
 127                 "Settings.FirstStartupPage", start_url);
 128           }
 129         }
 130       }
 131     }
 132   }
 133
 134 #if !defined(OS_ANDROID)
 135   StartupTabs startup_tabs = PinnedTabCodec::ReadPinnedTabs(profile_);
 136   UMA_HISTOGRAM_CUSTOM_COUNTS("Settings.PinnedTabs",
 137                               startup_tabs.size(), 1, 50, 20);
 138   for (size_t i = 0; i < startup_tabs.size(); ++i) {
 139     GURL start_url(startup_tabs.at(i).url);
 140     if (start_url.is_valid()) {
 141       UMA_HISTOGRAM_ENUMERATION(
 142           "Settings.PinnedTabEngineTypes",
 143           TemplateURLPrepopulateData::GetEngineType(start_url),
 144           SEARCH_ENGINE_MAX);
 145     }
 146   }
 147 #endif
 148 }
 149
 150 void PrefMetricsService::RegisterSyncedPrefObservers() {
 151   LogHistogramValueCallback booleanHandler = base::Bind(
 152       &PrefMetricsService::LogBooleanPrefChange, base::Unretained(this));
 153
 154   AddPrefObserver(prefs::kShowHomeButton, "ShowHomeButton", booleanHandler);
 155   AddPrefObserver(prefs::kHomePageIsNewTabPage, "HomePageIsNewTabPage",
 156                   booleanHandler);
 157
 158   AddPrefObserver(prefs::kRestoreOnStartup, "StartupPageLoadSettings",
 159                   base::Bind(&PrefMetricsService::LogIntegerPrefChange,
 160                              base::Unretained(this),
 161                              kSessionStartupPrefValueMax));
 162 }
 163
 164 void PrefMetricsService::AddPrefObserver(
 165     const std::string& path,
 166     const std::string& histogram_name_prefix,
 167     const LogHistogramValueCallback& callback) {
 168   synced_pref_change_registrar_->Add(path.c_str(),
 169       base::Bind(&PrefMetricsService::OnPrefChanged,
 170                  base::Unretained(this),
 171                  histogram_name_prefix, callback));
 172 }
 173
 174 void PrefMetricsService::OnPrefChanged(
 175     const std::string& histogram_name_prefix,
 176     const LogHistogramValueCallback& callback,
 177     const std::string& path,
 178     bool from_sync) {
 179   PrefServiceSyncable* prefs = PrefServiceSyncable::FromProfile(profile_);
 180   const PrefService::Preference* pref = prefs->FindPreference(path.c_str());
 181   DCHECK(pref);
 182   std::string source_name(
 183       from_sync ? ".PulledFromSync" : ".PushedToSync");
 184   std::string histogram_name("Settings." + histogram_name_prefix + source_name);
 185   callback.Run(histogram_name, pref->GetValue());
 186 }
 187
 188 void PrefMetricsService::LogBooleanPrefChange(const std::string& histogram_name,
 189                                               const base::Value* value) {
 190   bool boolean_value = false;
 191   if (!value->GetAsBoolean(&boolean_value))
 192     return;
 193   base::HistogramBase* histogram = base::BooleanHistogram::FactoryGet(
 194       histogram_name, base::HistogramBase::kUmaTargetedHistogramFlag);
 195   histogram->Add(boolean_value);
 196 }
 197
 198 void PrefMetricsService::LogIntegerPrefChange(int boundary_value,
 199                                               const std::string& histogram_name,
 200                                               const base::Value* value) {
 201   int integer_value = 0;
 202   if (!value->GetAsInteger(&integer_value))
 203     return;
 204   base::HistogramBase* histogram = base::LinearHistogram::FactoryGet(
 205       histogram_name,
 206       1,
 207       boundary_value,
 208       boundary_value + 1,
 209       base::HistogramBase::kUmaTargetedHistogramFlag);
 210   histogram->Add(integer_value);
 211 }
 212
 213 // static
 214 PrefMetricsService::Factory* PrefMetricsService::Factory::GetInstance() {
 215   return base::Singleton<PrefMetricsService::Factory>::get();
 216 }
 217
 218 // static
 219 PrefMetricsService* PrefMetricsService::Factory::GetForProfile(
 220     Profile* profile) {
 221   return static_cast<PrefMetricsService*>(
 222       GetInstance()->GetServiceForBrowserContext(profile, true));
 223 }
 224
 225 PrefMetricsService::Factory::Factory()
 226     : BrowserContextKeyedServiceFactory(
 227         "PrefMetricsService",
 228         BrowserContextDependencyManager::GetInstance()) {
 229   DependsOn(TemplateURLServiceFactory::GetInstance());
 230 }
 231
 232 PrefMetricsService::Factory::~Factory() {
 233 }
 234
 235 KeyedService* PrefMetricsService::Factory::BuildServiceInstanceFor(
 236     content::BrowserContext* profile) const {
 237   return new PrefMetricsService(static_cast<Profile*>(profile));
 238 }
 239
 240 bool PrefMetricsService::Factory::ServiceIsCreatedWithBrowserContext() const {
 241   return true;
 242 }
 243
 244 bool PrefMetricsService::Factory::ServiceIsNULLWhileTesting() const {
 245   return false;
 246 }
 247
 248 content::BrowserContext* PrefMetricsService::Factory::GetBrowserContextToUse(
 249     content::BrowserContext* context) const {
 250   return chrome::GetBrowserContextRedirectedInIncognito(context);
 251 }