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