Remove kMinScrollSuccessiveVelocityEvents

chrome/browser/ui/gesture_prefs_observer_factory_aura.cc

 // Copyright (c) 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/ui/gesture_prefs_observer_factory_aura.h"
 
 #include <vector>
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/compiler_specific.h"
 #include "base/prefs/pref_change_registrar.h"
 #include "base/prefs/pref_service.h"
 #include "chrome/browser/chrome_notification_types.h"
 #include "chrome/browser/profiles/incognito_helpers.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/common/pref_names.h"
 #include "components/keyed_service/content/browser_context_dependency_manager.h"
 #include "components/user_prefs/pref_registry_syncable.h"
 #include "content/public/browser/notification_observer.h"
 #include "content/public/browser/notification_service.h"
 #include "content/public/browser/overscroll_configuration.h"
 #include "content/public/common/renderer_preferences.h"
 #include "ui/events/gestures/gesture_configuration.h"
 
 using ui::GestureConfiguration;
 
 namespace {
 
-// TODO(tdresser): Remove this deprecated pref. See crbug.com/339486.
-const char kMinScrollSuccessiveVelocityEvents[] =
-    "gesture.min_scroll_successive_velocity_events";
-
 struct OverscrollPref {
   const char* pref_name;
   content::OverscrollConfig config;
 };
 
 const std::vector<OverscrollPref>& GetOverscrollPrefs() {
   CR_DEFINE_STATIC_LOCAL(std::vector<OverscrollPref>, overscroll_prefs, ());
   if (overscroll_prefs.empty()) {
     using namespace content;
     const OverscrollPref kOverscrollPrefs[] = {
@@ skipping 86 matching lines @@
 };
 
 const char* kFlingTouchscreenPrefs[] = {
   prefs::kFlingCurveTouchscreenAlpha,
   prefs::kFlingCurveTouchscreenBeta,
   prefs::kFlingCurveTouchscreenGamma,
 };
 
 GesturePrefsObserver::GesturePrefsObserver(PrefService* prefs)
     : prefs_(prefs) {
-  // Clear for migration.
-  prefs->ClearPref(kMinScrollSuccessiveVelocityEvents);
-
   registrar_.Init(prefs);
   registrar_.RemoveAll();
   base::Closure callback = base::Bind(&GesturePrefsObserver::Update,
                                       base::Unretained(this));
 
   base::Closure notify_callback = base::Bind(&GesturePrefsObserver::Notify,
                                              base::Unretained(this));
 
   for (size_t i = 0; i < arraysize(kPrefsToObserve); ++i)
     registrar_.Add(kPrefsToObserve[i], callback);
@@ skipping 275 matching lines @@
       GestureConfiguration::rail_start_proportion(),
       user_prefs::PrefRegistrySyncable::UNSYNCABLE_PREF);
   registry->RegisterDoublePref(
       prefs::kScrollPredictionSeconds,
       GestureConfiguration::scroll_prediction_seconds(),
       user_prefs::PrefRegistrySyncable::UNSYNCABLE_PREF);
   registry->RegisterIntegerPref(
       prefs::kShowPressDelayInMS,
       GestureConfiguration::show_press_delay_in_ms(),
       user_prefs::PrefRegistrySyncable::UNSYNCABLE_PREF);
-
-  // Register for migration.
-  registry->RegisterIntegerPref(
-      kMinScrollSuccessiveVelocityEvents,
-      0,
-      user_prefs::PrefRegistrySyncable::UNSYNCABLE_PREF);
-
   RegisterOverscrollPrefs(registry);
   RegisterFlingCurveParameters(registry);
 }
 
 bool
 GesturePrefsObserverFactoryAura::ServiceIsCreatedWithBrowserContext() const {
   // Create the observer as soon as the profile is created.
   return true;
 }
 
 content::BrowserContext*
 GesturePrefsObserverFactoryAura::GetBrowserContextToUse(
     content::BrowserContext* context) const {
   // Use same gesture preferences on incognito windows.
   return chrome::GetBrowserContextRedirectedInIncognito(context);
 }
 
 bool GesturePrefsObserverFactoryAura::ServiceIsNULLWhileTesting() const {
   // Some tests replace the PrefService of the TestingProfile after the
   // GesturePrefsObserver has been created, which makes Shutdown()
   // remove the registrar from a non-existent PrefService.
   return true;
 }