Upstream Chrome on iOS source code [8/11].

ios/chrome/browser/ui/settings/save_passwords_collection_view_controller.mm

Index: ios/chrome/browser/ui/settings/save_passwords_collection_view_controller.mm
diff --git a/ios/chrome/browser/ui/settings/save_passwords_collection_view_controller.mm b/ios/chrome/browser/ui/settings/save_passwords_collection_view_controller.mm
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+// Copyright 2015 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.
+
+#import "ios/chrome/browser/ui/settings/save_passwords_collection_view_controller.h"
+
+#include <memory>
+
+#include "base/ios/ios_util.h"
+#include "base/ios/weak_nsobject.h"
+#include "base/logging.h"
+#include "base/mac/foundation_util.h"
+#include "base/mac/objc_property_releaser.h"
+#include "base/mac/scoped_nsobject.h"
+#include "base/memory/scoped_vector.h"
+#include "base/numerics/safe_conversions.h"
+#include "base/strings/sys_string_conversions.h"
+#include "base/strings/utf_string_conversions.h"
+#include "components/autofill/core/common/password_form.h"
+#include "components/browser_sync/profile_sync_service.h"
+#include "components/google/core/browser/google_util.h"
+#include "components/keyed_service/core/service_access_type.h"
+#include "components/password_manager/core/browser/affiliation_utils.h"
+#include "components/password_manager/core/browser/password_bubble_experiment.h"
+#include "components/password_manager/core/browser/password_manager_constants.h"
+#include "components/password_manager/core/browser/password_store.h"
+#include "components/password_manager/core/browser/password_store_consumer.h"
+#include "components/password_manager/core/common/password_manager_pref_names.h"
+#include "components/prefs/pref_member.h"
+#include "components/prefs/pref_service.h"
+#include "components/strings/grit/components_strings.h"
+#include "components/url_formatter/url_formatter.h"
+#include "ios/chrome/browser/application_context.h"
+#include "ios/chrome/browser/browser_state/chrome_browser_state.h"
+#include "ios/chrome/browser/experimental_flags.h"
+#include "ios/chrome/browser/passwords/ios_chrome_password_store_factory.h"
+#include "ios/chrome/browser/sync/ios_chrome_profile_sync_service_factory.h"
+#import "ios/chrome/browser/ui/collection_view/cells/MDCCollectionViewCell+Chrome.h"
+#import "ios/chrome/browser/ui/collection_view/cells/collection_view_footer_item.h"
+#import "ios/chrome/browser/ui/collection_view/cells/collection_view_item.h"
+#import "ios/chrome/browser/ui/collection_view/cells/collection_view_switch_item.h"
+#import "ios/chrome/browser/ui/collection_view/cells/collection_view_text_item.h"
+#import "ios/chrome/browser/ui/collection_view/collection_view_model.h"
+#import "ios/chrome/browser/ui/settings/password_details_collection_view_controller.h"
+#import "ios/chrome/browser/ui/settings/reauthentication_module.h"
+#import "ios/chrome/browser/ui/settings/settings_utils.h"
+#import "ios/chrome/browser/ui/settings/utils/pref_backed_boolean.h"
+#include "ios/chrome/grit/ios_strings.h"
+#import "ios/third_party/material_components_ios/src/components/Palettes/src/MaterialPalettes.h"
+#include "ui/base/l10n/l10n_util_mac.h"
+#include "url/gurl.h"
+
+namespace {
+
+typedef NS_ENUM(NSInteger, SectionIdentifier) {
+  SectionIdentifierMessage = kSectionIdentifierEnumZero,
+  SectionIdentifierSavePasswordsSwitch,
+  SectionIdentifierSavedPasswords,
+  SectionIdentifierBlacklist,
+};
+
+typedef NS_ENUM(NSInteger, ItemType) {
+  ItemTypeManageAccount = kItemTypeEnumZero,
+  ItemTypeHeader,
+  ItemTypeSavePasswordsSwitch,
+  ItemTypeSavedPassword,  // This is a repeated item type.
+  ItemTypeBlacklisted,    // This is a repeated item type.
+};
+
+// TODO(crbug.com/669538): This function should be removed after original
+// version of GetHumanReadableOrigin will be moved to affiliation_utils.
+std::string GetHumanReadableOriginCopy(
+    const autofill::PasswordForm& password_form) {
+  password_manager::FacetURI facet_uri =
+      password_manager::FacetURI::FromPotentiallyInvalidSpec(
+          password_form.signon_realm);
+  if (facet_uri.IsValidAndroidFacetURI())
+    return facet_uri.scheme() + "://" + facet_uri.android_package_name();
+  return base::UTF16ToUTF8(url_formatter::FormatUrl(password_form.origin));
+}
+
+}  // namespace
+
+@interface SavePasswordsCollectionViewController (UsedBySavePasswordsConsumer)
+// Callback called when the async request launched from
+// |getLoginsFromPasswordStore| finishes.
+- (void)onGetPasswordStoreResults:
+    (const std::vector<std::unique_ptr<autofill::PasswordForm>>&)result;
+@end
+
+namespace password_manager {
+// A bridge C++ class passing notification about finished password store
+// requests to owning Obj-C class SavePasswordsCollectionViewController.
+class SavePasswordsConsumer : public PasswordStoreConsumer {
+ public:
+  explicit SavePasswordsConsumer(
+      SavePasswordsCollectionViewController* delegate);
+  ~SavePasswordsConsumer() override;
+  void OnGetPasswordStoreResults(
+      std::vector<std::unique_ptr<autofill::PasswordForm>> results) override;
+
+ private:
+  __unsafe_unretained SavePasswordsCollectionViewController* delegate_;  // weak
+  DISALLOW_COPY_AND_ASSIGN(SavePasswordsConsumer);
+};
+
+SavePasswordsConsumer::SavePasswordsConsumer(
+    SavePasswordsCollectionViewController* delegate)
+    : delegate_(delegate) {}
+
+SavePasswordsConsumer::~SavePasswordsConsumer() {}
+
+void SavePasswordsConsumer::OnGetPasswordStoreResults(
+    std::vector<std::unique_ptr<autofill::PasswordForm>> results) {
+  if (!results.empty())
+    [delegate_ onGetPasswordStoreResults:results];
+}
+}  // namespace password_manager
+
+// Use the type of the items to convey the Saved/Blacklisted status.
+@interface SavedFormContentItem : CollectionViewTextItem
+@end
+@implementation SavedFormContentItem
+@end
+@interface BlacklistedFormContentItem : CollectionViewTextItem
+@end
+@implementation BlacklistedFormContentItem
+@end
+
+@interface SavePasswordsCollectionViewController ()<
+    BooleanObserver,
+    PasswordDetailsCollectionViewControllerDelegate,
+    SuccessfulReauthTimeAccessor> {
+  // The observable boolean that binds to the password manager setting state.
+  // Saved passwords are only on if the password manager is enabled.
+  base::scoped_nsobject<PrefBackedBoolean> passwordManagerEnabled_;
+  // The item related to the switch for the password manager setting.
+  base::scoped_nsobject<CollectionViewSwitchItem> savePasswordsItem_;
+  // The interface for getting and manipulating a user's saved passwords.
+  scoped_refptr<password_manager::PasswordStore> passwordStore_;
+  // A helper object for passing data about saved passwords from a finished
+  // password store request to the SavePasswordsCollectionViewController.
+  std::unique_ptr<password_manager::SavePasswordsConsumer>
+      savedPasswordsConsumer_;
+  // A helper object for passing data about blacklisted sites from a finished
+  // password store request to the SavePasswordsCollectionViewController.
+  std::unique_ptr<password_manager::SavePasswordsConsumer>
+      blacklistPasswordsConsumer_;
+  // The list of the user's saved passwords.
+  ScopedVector<autofill::PasswordForm> savedForms_;
+  // The list of the user's blacklisted sites.
+  ScopedVector<autofill::PasswordForm> blacklistedForms_;
+  // Deletion of password being asynchronous, and the method taking a reference
+  // to the PasswordForm, the PasswordForm must outlive the calls to
+  // RemoveLogin. This vector will ensure this.
+  ScopedVector<autofill::PasswordForm> deletedForms_;
+  // The current Chrome browser state.
+  ios::ChromeBrowserState* browserState_;
+  // Object storing the time of the previous successful re-authentication.
+  // This is meant to be used by the |ReauthenticationModule| for keeping
+  // re-authentications valid for a certain time interval within the scope
+  // of the Save Passwords Settings.
+  base::scoped_nsobject<NSDate> successfulReauthTime_;
+  // Module containing the reauthentication mechanism for viewing and copying
+  // passwords.
+  base::scoped_nsobject<ReauthenticationModule> reauthenticationModule_;
+
+  base::mac::ObjCPropertyReleaser
+      propertyReleaser_SavePasswordsCollectionViewController_;
+}
+// Kick off async request to get logins from password store.
+- (void)getLoginsFromPasswordStore;
+@end
+
+@implementation SavePasswordsCollectionViewController
+
+#pragma mark - Initialization
+
+- (instancetype)initWithBrowserState:(ios::ChromeBrowserState*)browserState {
+  DCHECK(browserState);
+  self = [super initWithStyle:CollectionViewControllerStyleAppBar];
+  if (self) {
+    browserState_ = browserState;
+    reauthenticationModule_.reset([[ReauthenticationModule alloc]
+        initWithSuccessfulReauthTimeAccessor:self]);
+    int titleId = IDS_IOS_SAVE_PASSWORDS;
+    syncer::SyncService* syncService =
+        IOSChromeProfileSyncServiceFactory::GetForBrowserState(browserState_);
+    if (password_bubble_experiment::IsSmartLockBrandingEnabled(syncService)) {
+      titleId = IDS_IOS_SAVE_PASSWORDS_SMART_LOCK;
+    }
+    self.title = l10n_util::GetNSString(titleId);
+    self.shouldHideDoneButton = YES;
+    passwordStore_ = IOSChromePasswordStoreFactory::GetForBrowserState(
+        browserState_, ServiceAccessType::EXPLICIT_ACCESS);
+    DCHECK(passwordStore_);
+    passwordManagerEnabled_.reset([[PrefBackedBoolean alloc]
+        initWithPrefService:browserState_->GetPrefs()
+                   prefName:password_manager::prefs::
+                                kPasswordManagerSavingEnabled]);
+    [passwordManagerEnabled_ setObserver:self];
+    [self getLoginsFromPasswordStore];
+    [self updateEditButton];
+    [self loadModel];
+
+    propertyReleaser_SavePasswordsCollectionViewController_.Init(
+        self, [SavePasswordsCollectionViewController class]);
+  }
+  return self;
+}
+
+- (void)dealloc {
+  [passwordManagerEnabled_ setObserver:nil];
+  [super dealloc];
+}
+
+#pragma mark - SettingsRootCollectionViewController
+
+- (void)loadModel {
+  [super loadModel];
+  CollectionViewModel* model = self.collectionViewModel;
+
+  // Manage account message.
+  CollectionViewItem* manageAccountLinkItem = [self manageAccountLinkItem];
+  if (manageAccountLinkItem) {
+    [model addSectionWithIdentifier:SectionIdentifierMessage];
+    [model addItem:manageAccountLinkItem
+        toSectionWithIdentifier:SectionIdentifierMessage];
+  }
+
+  // Save passwords switch.
+  [model addSectionWithIdentifier:SectionIdentifierSavePasswordsSwitch];
+  savePasswordsItem_.reset([[self savePasswordsItem] retain]);
+  [model addItem:savePasswordsItem_
+      toSectionWithIdentifier:SectionIdentifierSavePasswordsSwitch];
+
+  // Saved passwords.
+  if ([passwordManagerEnabled_ value]) {
+    if (!savedForms_.empty()) {
+      [model addSectionWithIdentifier:SectionIdentifierSavedPasswords];
+      CollectionViewTextItem* headerItem = [[[CollectionViewTextItem alloc]
+          initWithType:ItemTypeHeader] autorelease];
+      headerItem.text =
+          l10n_util::GetNSString(IDS_PASSWORD_MANAGER_SHOW_PASSWORDS_TAB_TITLE);
+      [model setHeader:headerItem
+          forSectionWithIdentifier:SectionIdentifierSavedPasswords];
+      for (size_t i = 0; i < savedForms_.size(); ++i) {
+        autofill::PasswordForm* form = savedForms_[i];
+        [model addItem:[self savedFormItemWithForm:form]
+            toSectionWithIdentifier:SectionIdentifierSavedPasswords];
+      }
+    }
+    if (!blacklistedForms_.empty()) {
+      [model addSectionWithIdentifier:SectionIdentifierBlacklist];
+      CollectionViewTextItem* headerItem = [[[CollectionViewTextItem alloc]
+          initWithType:ItemTypeHeader] autorelease];
+      headerItem.text =
+          l10n_util::GetNSString(IDS_PASSWORD_MANAGER_EXCEPTIONS_TAB_TITLE);
+      [model setHeader:headerItem
+          forSectionWithIdentifier:SectionIdentifierBlacklist];
+      for (size_t i = 0; i < blacklistedForms_.size(); ++i) {
+        autofill::PasswordForm* form = blacklistedForms_[i];
+        [model addItem:[self blacklistedFormItemWithForm:form]
+            toSectionWithIdentifier:SectionIdentifierBlacklist];
+      }
+    }
+  }
+}
+
+#pragma mark - Items
+
+- (CollectionViewItem*)manageAccountLinkItem {
+  CollectionViewFooterItem* footerItem = [[[CollectionViewFooterItem alloc]
+      initWithType:ItemTypeManageAccount] autorelease];
+  footerItem.text =
+      l10n_util::GetNSString(IDS_IOS_SAVE_PASSWORDS_MANAGE_ACCOUNT);
+  footerItem.linkURL = google_util::AppendGoogleLocaleParam(
+      GURL(password_manager::kPasswordManagerAccountDashboardURL),
+      GetApplicationContext()->GetApplicationLocale());
+  footerItem.linkDelegate = self;
+  return footerItem;
+}
+
+- (CollectionViewSwitchItem*)savePasswordsItem {
+  CollectionViewSwitchItem* savePasswordsItem =
+      [[[CollectionViewSwitchItem alloc]
+          initWithType:ItemTypeSavePasswordsSwitch] autorelease];
+  savePasswordsItem.text = l10n_util::GetNSString(IDS_IOS_SAVE_PASSWORDS);
+  savePasswordsItem.on = [passwordManagerEnabled_ value];
+  return savePasswordsItem;
+}
+
+- (SavedFormContentItem*)savedFormItemWithForm:(autofill::PasswordForm*)form {
+  SavedFormContentItem* passwordItem = [[[SavedFormContentItem alloc]
+      initWithType:ItemTypeSavedPassword] autorelease];
+  passwordItem.text =
+      base::SysUTF8ToNSString(GetHumanReadableOriginCopy(*form));
+  passwordItem.detailText = base::SysUTF16ToNSString(form->username_value);
+  if (experimental_flags::IsViewCopyPasswordsEnabled()) {
+    passwordItem.accessibilityTraits |= UIAccessibilityTraitButton;
+    passwordItem.accessoryType =
+        MDCCollectionViewCellAccessoryDisclosureIndicator;
+  }
+  return passwordItem;
+}
+
+- (BlacklistedFormContentItem*)blacklistedFormItemWithForm:
+    (autofill::PasswordForm*)form {
+  BlacklistedFormContentItem* passwordItem =
+      [[[BlacklistedFormContentItem alloc] initWithType:ItemTypeBlacklisted]
+          autorelease];
+  passwordItem.text =
+      base::SysUTF8ToNSString(GetHumanReadableOriginCopy(*form));
+  return passwordItem;
+}
+
+#pragma mark - MDCCollectionViewEditingDelegate
+
+- (BOOL)collectionViewAllowsEditing:(UICollectionView*)collectionView {
+  return YES;
+}
+
+#pragma mark - MDCCollectionViewStylingDelegate
+
+- (MDCCollectionViewCellStyle)collectionView:(UICollectionView*)collectionView
+                         cellStyleForSection:(NSInteger)section {
+  NSInteger sectionIdentifier =
+      [self.collectionViewModel sectionIdentifierForSection:section];
+  switch (sectionIdentifier) {
+    case SectionIdentifierMessage:
+      // Display the message in the default style with no "card" UI and no
+      // section padding.
+      return MDCCollectionViewCellStyleDefault;
+    default:
+      return self.styler.cellStyle;
+  }
+}
+
+- (BOOL)collectionView:(UICollectionView*)collectionView
+    shouldHideItemBackgroundAtIndexPath:(NSIndexPath*)indexPath {
+  NSInteger sectionIdentifier =
+      [self.collectionViewModel sectionIdentifierForSection:indexPath.section];
+  switch (sectionIdentifier) {
+    case SectionIdentifierMessage:
+      // Display the message without any background image or shadowing.
+      return YES;
+    default:
+      return NO;
+  }
+}
+
+- (CGFloat)collectionView:(UICollectionView*)collectionView
+    cellHeightAtIndexPath:(NSIndexPath*)indexPath {
+  CollectionViewItem* item =
+      [self.collectionViewModel itemAtIndexPath:indexPath];
+  switch (item.type) {
+    case ItemTypeManageAccount:
+      return [MDCCollectionViewCell
+          cr_preferredHeightForWidth:CGRectGetWidth(collectionView.bounds)
+                             forItem:item];
+    case ItemTypeSavedPassword:
+      return MDCCellDefaultTwoLineHeight;
+    default:
+      return MDCCellDefaultOneLineHeight;
+  }
+}
+
+- (BOOL)collectionView:(UICollectionView*)collectionView
+    hidesInkViewAtIndexPath:(NSIndexPath*)indexPath {
+  NSInteger type = [self.collectionViewModel itemTypeForIndexPath:indexPath];
+  switch (type) {
+    case ItemTypeSavePasswordsSwitch:
+      return YES;
+    default:
+      return NO;
+  }
+}
+
+#pragma mark - UICollectionViewDataSource
+
+- (UICollectionViewCell*)collectionView:(UICollectionView*)collectionView
+                 cellForItemAtIndexPath:(NSIndexPath*)indexPath {
+  UICollectionViewCell* cell =
+      [super collectionView:collectionView cellForItemAtIndexPath:indexPath];
+
+  if ([self.collectionViewModel itemTypeForIndexPath:indexPath] ==
+      ItemTypeSavePasswordsSwitch) {
+    CollectionViewSwitchCell* switchCell =
+        base::mac::ObjCCastStrict<CollectionViewSwitchCell>(cell);
+    [switchCell.switchView addTarget:self
+                              action:@selector(savePasswordsSwitchChanged:)
+                    forControlEvents:UIControlEventValueChanged];
+  }
+  return cell;
+}
+
+- (UICollectionReusableView*)collectionView:(UICollectionView*)collectionView
+          viewForSupplementaryElementOfKind:(NSString*)kind
+                                atIndexPath:(NSIndexPath*)indexPath {
+  UICollectionReusableView* view = [super collectionView:collectionView
+                       viewForSupplementaryElementOfKind:kind
+                                             atIndexPath:indexPath];
+  MDCCollectionViewTextCell* textCell =
+      base::mac::ObjCCast<MDCCollectionViewTextCell>(view);
+  if (textCell) {
+    textCell.textLabel.textColor = [[MDCPalette greyPalette] tint500];
+  }
+  return view;
+};
+
+#pragma mark - BooleanObserver
+
+- (void)booleanDidChange:(id<ObservableBoolean>)observableBoolean {
+  DCHECK_EQ(observableBoolean, passwordManagerEnabled_.get());
+
+  // Update the item.
+  savePasswordsItem_.get().on = [passwordManagerEnabled_ value];
+
+  // Update the cell.
+  [self reconfigureCellsForItems:@[ savePasswordsItem_ ]
+         inSectionWithIdentifier:SectionIdentifierSavePasswordsSwitch];
+
+  // Update the rest of the UI.
+  [self.editor setEditing:NO];
+  [self updateEditButton];
+  [self reloadData];
+}
+
+#pragma mark - Actions
+
+- (void)savePasswordsSwitchChanged:(UISwitch*)switchView {
+  // Update the setting.
+  [passwordManagerEnabled_ setValue:switchView.on];
+
+  // Update the item.
+  savePasswordsItem_.get().on = [passwordManagerEnabled_ value];
+
+  // Update the rest of the UI.
+  [self.editor setEditing:NO];
+  [self updateEditButton];
+  [self reloadData];
+}
+
+#pragma mark - Private methods
+
+- (void)getLoginsFromPasswordStore {
+  savedPasswordsConsumer_.reset(
+      new password_manager::SavePasswordsConsumer(self));
+  passwordStore_->GetAutofillableLogins(savedPasswordsConsumer_.get());
+  blacklistPasswordsConsumer_.reset(
+      new password_manager::SavePasswordsConsumer(self));
+  passwordStore_->GetBlacklistLogins(blacklistPasswordsConsumer_.get());
+}
+
+- (void)onGetPasswordStoreResults:
+    (const std::vector<std::unique_ptr<autofill::PasswordForm>>&)result {
+  for (auto it = result.begin(); it != result.end(); ++it) {
+    // PasswordForm is needed when user wants to delete the site/password.
+    autofill::PasswordForm* form = new autofill::PasswordForm(**it);
+    if (form->blacklisted_by_user)
+      blacklistedForms_.push_back(form);
+    else
+      savedForms_.push_back(form);
+  }
+
+  [self updateEditButton];
+  [self reloadData];
+}
+
+- (BOOL)shouldShowEditButton {
+  return [passwordManagerEnabled_ value];
+}
+
+- (BOOL)editButtonEnabled {
+  DCHECK([self shouldShowEditButton]);
+  return !savedForms_.empty() || !blacklistedForms_.empty();
+}
+
+#pragma mark UICollectionViewDelegate
+
+- (void)collectionView:(UICollectionView*)collectionView
+    didSelectItemAtIndexPath:(NSIndexPath*)indexPath {
+  [super collectionView:collectionView didSelectItemAtIndexPath:indexPath];
+
+  // Actions should only take effect when not in editing mode.
+  if (self.editing) {
+    return;
+  }
+
+  CollectionViewModel* model = self.collectionViewModel;
+  if ([model itemTypeForIndexPath:indexPath] == ItemTypeSavedPassword) {
+    DCHECK_EQ([model sectionIdentifierForSection:indexPath.section],
+              SectionIdentifierSavedPasswords);
+    if (experimental_flags::IsViewCopyPasswordsEnabled()) {
+      DCHECK_LT(base::checked_cast<size_t>(indexPath.item), savedForms_.size());
+      autofill::PasswordForm* form = savedForms_[indexPath.item];
+      NSString* username = base::SysUTF16ToNSString(form->username_value);
+      NSString* password = base::SysUTF16ToNSString(form->password_value);
+      NSString* origin =
+          base::SysUTF8ToNSString(GetHumanReadableOriginCopy(*form));
+      base::scoped_nsobject<UIViewController> controller(
+          [[PasswordDetailsCollectionViewController alloc]
+                initWithPasswordForm:*form
+                            delegate:self
+              reauthenticationModule:reauthenticationModule_
+                            username:username
+                            password:password
+                              origin:origin]);
+      [self.navigationController pushViewController:controller animated:YES];
+    }
+  }
+}
+
+#pragma mark MDCCollectionViewEditingDelegate
+
+- (BOOL)collectionView:(UICollectionView*)collectionView
+    canEditItemAtIndexPath:(NSIndexPath*)indexPath {
+  // Only password cells are editable.
+  CollectionViewItem* item =
+      [self.collectionViewModel itemAtIndexPath:indexPath];
+  return [item isKindOfClass:[SavedFormContentItem class]] ||
+         [item isKindOfClass:[BlacklistedFormContentItem class]];
+}
+
+- (void)collectionView:(UICollectionView*)collectionView
+    willDeleteItemsAtIndexPaths:(NSArray*)indexPaths {
+  // Ensure indexPaths are sorted to maintain delete logic, and keep track of
+  // number of items deleted to adjust index for accessing elements in the
+  // forms vectors.
+  NSArray* sortedIndexPaths =
+      [indexPaths sortedArrayUsingSelector:@selector(compare:)];
+  int passwordsDeleted = 0;
+  int blacklistedDeleted = 0;
+  for (NSIndexPath* indexPath in sortedIndexPaths) {
+    // Only form items are editable.
+    CollectionViewTextItem* item =
+        base::mac::ObjCCastStrict<CollectionViewTextItem>(
+            [self.collectionViewModel itemAtIndexPath:indexPath]);
+    BOOL blacklisted = [item isKindOfClass:[BlacklistedFormContentItem class]];
+    unsigned int formIndex = (unsigned int)indexPath.item;
+    // Adjust index to account for deleted items.
+    formIndex -= blacklisted ? blacklistedDeleted : passwordsDeleted;
+    ScopedVector<autofill::PasswordForm>& forms =
+        blacklisted ? blacklistedForms_ : savedForms_;
+    DCHECK_LT(formIndex, forms.size());
+    auto formIterator = forms.begin() + formIndex;
+    passwordStore_->RemoveLogin(**formIterator);
+    deletedForms_.push_back(*formIterator);
+    forms.weak_erase(formIterator);
+    if (blacklisted) {
+      ++blacklistedDeleted;
+    } else {
+      ++passwordsDeleted;
+    }
+  }
+
+  // Must call super at the end of the child implementation.
+  [super collectionView:collectionView willDeleteItemsAtIndexPaths:indexPaths];
+}
+
+- (void)collectionView:(UICollectionView*)collectionView
+    didDeleteItemsAtIndexPaths:(NSArray*)indexPaths {
+  // Remove empty sections.
+  // TODO(crbug.com/593786): Move this logic in CollectionViewController.
+  NSMutableOrderedSet* sectionsToRemove = [NSMutableOrderedSet orderedSet];
+  // Sort and enumerate in reverse order to delete the items from the collection
+  // view model.
+  NSArray* sortedIndexPaths =
+      [indexPaths sortedArrayUsingSelector:@selector(compare:)];
+  for (NSIndexPath* indexPath in [sortedIndexPaths reverseObjectEnumerator]) {
+    if ([collectionView numberOfItemsInSection:indexPath.section] == 0) {
+      [sectionsToRemove addObject:@(indexPath.section)];
+    }
+  }
+  base::WeakNSObject<SavePasswordsCollectionViewController> weakSelf(self);
+  [self.collectionView performBatchUpdates:^{
+    base::scoped_nsobject<SavePasswordsCollectionViewController> strongSelf(
+        [weakSelf retain]);
+    if (!strongSelf)
+      return;
+    for (NSNumber* sectionNumber in sectionsToRemove) {
+      NSInteger section = [sectionNumber integerValue];
+      NSInteger sectionIdentifier = [[strongSelf collectionViewModel]
+          sectionIdentifierForSection:section];
+      [[strongSelf collectionViewModel]
+          removeSectionWithIdentifier:sectionIdentifier];
+      [[strongSelf collectionView]
+          deleteSections:[NSIndexSet indexSetWithIndex:section]];
+    }
+  }
+      completion:^(BOOL finished) {
+        base::scoped_nsobject<SavePasswordsCollectionViewController> strongSelf(
+            [weakSelf retain]);
+        if (!strongSelf)
+          return;
+        if (![strongSelf editButtonEnabled]) {
+          [strongSelf setEditing:NO];
+        }
+        [strongSelf updateEditButton];
+      }];
+}
+
+#pragma mark PasswordDetailsCollectionViewControllerDelegate
+
+- (void)deletePassword:(const autofill::PasswordForm&)form {
+  passwordStore_->RemoveLogin(form);
+  for (auto it = savedForms_.begin(); it != savedForms_.end(); ++it) {
+    if (**it == form) {
+      savedForms_.weak_erase(it);
+      return;
+    }
+  }
+  [self.navigationController popViewControllerAnimated:YES];
+}
+
+#pragma mark SuccessfulReauthTimeAccessor
+
+- (void)updateSuccessfulReauthTime {
+  successfulReauthTime_.reset([[NSDate alloc] init]);
+}
+
+- (NSDate*)lastSuccessfulReauthTime {
+  return successfulReauthTime_.get();
+}
+
+@end