Introduce ChromeZoomLevelPref, make zoom level prefs independent of profile prefs.

chrome/browser/profiles/profile_impl.cc

 // Copyright (c) 2012 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/profiles/profile_impl.h"
 
 #include <vector>
 
 #include "base/bind.h"
 #include "base/callback.h"
@@ skipping 55 matching lines @@
 #include "chrome/browser/profiles/profile_metrics.h"
 #include "chrome/browser/safe_browsing/safe_browsing_service.h"
 #include "chrome/browser/services/gcm/gcm_profile_service.h"
 #include "chrome/browser/services/gcm/gcm_profile_service_factory.h"
 #include "chrome/browser/services/gcm/push_messaging_service_impl.h"
 #include "chrome/browser/sessions/session_service_factory.h"
 #include "chrome/browser/signin/signin_ui_util.h"
 #include "chrome/browser/ssl/chrome_ssl_host_state_delegate.h"
 #include "chrome/browser/ssl/chrome_ssl_host_state_delegate_factory.h"
 #include "chrome/browser/ui/startup/startup_browser_creator.h"
+#include "chrome/browser/ui/zoom/chrome_zoom_level_prefs.h"
 #include "chrome/common/chrome_constants.h"
 #include "chrome/common/chrome_paths_internal.h"
 #include "chrome/common/chrome_switches.h"
 #include "chrome/common/chrome_version_info.h"
 #include "chrome/common/pref_names.h"
 #include "chrome/common/url_constants.h"
 #include "chrome/grit/chromium_strings.h"
 #include "components/bookmarks/browser/bookmark_model.h"
 #include "components/data_reduction_proxy/browser/data_reduction_proxy_params.h"
 #include "components/data_reduction_proxy/browser/data_reduction_proxy_settings.h"
@@ skipping 428 matching lines @@
   PrefService* prefs = GetPrefs();
   pref_change_registrar_.Init(prefs);
   pref_change_registrar_.Add(
       prefs::kGoogleServicesUsername,
       base::Bind(&ProfileImpl::UpdateProfileUserNameCache,
                  base::Unretained(this)));
   pref_change_registrar_.Add(
       prefs::kSupervisedUserId,
       base::Bind(&ProfileImpl::UpdateProfileSupervisedUserIdCache,
                  base::Unretained(this)));
-  pref_change_registrar_.Add(
-      prefs::kDefaultZoomLevel,
-      base::Bind(&ProfileImpl::OnDefaultZoomLevelChanged,
-                 base::Unretained(this)));
 
   // Changes in the profile avatar.
   pref_change_registrar_.Add(
       prefs::kProfileAvatarIndex,
       base::Bind(&ProfileImpl::UpdateProfileAvatarCache,
                  base::Unretained(this)));
   pref_change_registrar_.Add(
       prefs::kProfileUsingDefaultAvatar,
       base::Bind(&ProfileImpl::UpdateProfileAvatarCache,
                  base::Unretained(this)));
@@ skipping 208 matching lines @@
 
   gcm::PushMessagingServiceImpl::InitializeForProfile(this);
 
 #if !defined(OS_ANDROID) && !defined(OS_CHROMEOS) && !defined(OS_IOS)
   signin_ui_util::InitializePrefsForProfile(this);
 #endif
 }
 
 void ProfileImpl::InitHostZoomMap() {
   HostZoomMap* host_zoom_map = HostZoomMap::GetDefaultForBrowserContext(this);
-  host_zoom_map->SetDefaultZoomLevel(
-      prefs_->GetDouble(prefs::kDefaultZoomLevel));
+  DCHECK(!zoom_level_prefs_);
+  zoom_level_prefs_.reset(
+      new chrome::ChromeZoomLevelPrefs(prefs_.get(), GetPath()));
+  zoom_level_prefs_->InitPrefsAndCopyToHostZoomMap(GetPath(), host_zoom_map);
 
-  const base::DictionaryValue* host_zoom_dictionary =
-      prefs_->GetDictionary(prefs::kPerHostZoomLevels);
-  // Careful: The returned value could be NULL if the pref has never been set.
-  if (host_zoom_dictionary != NULL) {
-    std::vector<std::string> keys_to_remove;
-    for (base::DictionaryValue::Iterator i(*host_zoom_dictionary); !i.IsAtEnd();
-         i.Advance()) {
-      const std::string& host(i.key());
-      double zoom_level = 0;
-
-      bool success = i.value().GetAsDouble(&zoom_level);
-      DCHECK(success);
-
-      // Filter out A) the empty host, B) zoom levels equal to the default; and
-      // remember them, so that we can later erase them from Prefs.
-      // Values of type A and B could have been stored due to crbug.com/364399.
-      // Values of type B could further have been stored before the default zoom
-      // level was set to its current value. In either case, SetZoomLevelForHost
-      // will ignore type B values, thus, to have consistency with HostZoomMap's
-      // internal state, these values must also be removed from Prefs.
-      if (host.empty() ||
-          content::ZoomValuesEqual(zoom_level,
-                                   host_zoom_map->GetDefaultZoomLevel())) {
-        keys_to_remove.push_back(host);
-        continue;
-      }
-
-      host_zoom_map->SetZoomLevelForHost(host, zoom_level);
-    }
-
-    DictionaryPrefUpdate update(prefs_.get(), prefs::kPerHostZoomLevels);
-    base::DictionaryValue* host_zoom_dictionary = update.Get();
-    for (std::vector<std::string>::const_iterator it = keys_to_remove.begin();
-         it != keys_to_remove.end(); ++it) {
-      host_zoom_dictionary->RemoveWithoutPathExpansion(*it, NULL);
-    }
-  }
-
-  zoom_subscription_ = host_zoom_map->AddZoomLevelChangedCallback(
-      base::Bind(&ProfileImpl::OnZoomLevelChanged, base::Unretained(this)));
+  // TODO(wjmaclean): Remove this. crbug.com/420643
+  chrome::MigrateProfileZoomLevelPrefs(this);
 }
 
 base::FilePath ProfileImpl::last_selected_directory() {
   return GetPrefs()->GetFilePath(prefs::kSelectFileLastDirectory);
 }
 
 void ProfileImpl::set_last_selected_directory(const base::FilePath& path) {
   GetPrefs()->SetFilePath(prefs::kSelectFileLastDirectory, path);
 }
 
@@ skipping 200 matching lines @@
   // it to be set by asking for the prefs.
   GetPrefs();
   return last_session_exit_type_;
 }
 
 PrefService* ProfileImpl::GetPrefs() {
   DCHECK(prefs_);  // Should explicitly be initialized.
   return prefs_.get();
 }
 
+chrome::ChromeZoomLevelPrefs* ProfileImpl::GetZoomLevelPrefs() {

[Elliot Glaysher, 2014/10/10 19:05:11]

So, on what sort of timescale do you plan to remove this, and the other changes
to profile? I'm fine with these changes if the end result is to get all the zoom
stuff out of Profile.

[wjmaclean, 2014/10/10 19:18:39]

The timescale is intended to be "as quickly as possible", basically measured by
when we feel a sufficient number of users have (likely) migrated to the new
prefs structure, so we don't discard their prefs. There are a couple of CLs to
land after this one (to get HostZoomMap into StoragePartition) but they won't
extend the timeline for migrating prefs.

+  return zoom_level_prefs_.get();
+}
+
 PrefService* ProfileImpl::GetOffTheRecordPrefs() {
   DCHECK(prefs_);
   if (!otr_prefs_) {
     // The new ExtensionPrefStore is ref_counted and the new PrefService
     // stores a reference so that we do not leak memory here.
     otr_prefs_.reset(prefs_->CreateIncognitoPrefService(
         CreateExtensionPrefStore(this, true)));
   }
   return otr_prefs_.get();
 }
@@ skipping 128 matching lines @@
     top_sites_ = history::TopSites::Create(
         this, GetPath().Append(chrome::kTopSitesFilename));
   }
   return top_sites_.get();
 }
 
 history::TopSites* ProfileImpl::GetTopSitesWithoutCreating() {
   return top_sites_.get();
 }
 
-void ProfileImpl::OnDefaultZoomLevelChanged() {
-  HostZoomMap::GetDefaultForBrowserContext(this)->SetDefaultZoomLevel(
-      pref_change_registrar_.prefs()->GetDouble(prefs::kDefaultZoomLevel));
-}
-
-void ProfileImpl::OnZoomLevelChanged(
-    const HostZoomMap::ZoomLevelChange& change) {
-
-  if (change.mode != HostZoomMap::ZOOM_CHANGED_FOR_HOST)
-    return;
-  HostZoomMap* host_zoom_map = HostZoomMap::GetDefaultForBrowserContext(this);
-  double level = change.zoom_level;
-  DictionaryPrefUpdate update(prefs_.get(), prefs::kPerHostZoomLevels);
-  base::DictionaryValue* host_zoom_dictionary = update.Get();
-  if (content::ZoomValuesEqual(level, host_zoom_map->GetDefaultZoomLevel()))
-    host_zoom_dictionary->RemoveWithoutPathExpansion(change.host, NULL);
-  else
-    host_zoom_dictionary->SetDoubleWithoutPathExpansion(change.host, level);
-}
-
 #if defined(ENABLE_SESSION_SERVICE)
 void ProfileImpl::StopCreateSessionServiceTimer() {
   create_session_service_timer_.Stop();
 }
 
 void ProfileImpl::EnsureSessionServiceCreated() {
   SessionServiceFactory::GetForProfile(this);
 }
 #endif
 
@@ skipping 236 matching lines @@
 ProfileImpl::CreateDomainReliabilityMonitor(PrefService* local_state) {
   domain_reliability::DomainReliabilityService* service =
       domain_reliability::DomainReliabilityServiceFactory::GetInstance()->
           GetForBrowserContext(this);
   if (!service)
     return scoped_ptr<domain_reliability::DomainReliabilityMonitor>();
 
   return service->CreateMonitor(
       BrowserThread::GetMessageLoopProxyForThread(BrowserThread::IO));
 }