[ios] Moves dimsBackgroundDuringPresentation to obscure.

Moves all search controllers to use obscuresBackgroundDuringPresentation
instead of deprecated dimsBackgroundDuringPresentation.

Bug: 976348
Change-Id: Ic4e147efdb6de5d0e60355a2c10f02ac3b206778
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1678038Reviewed-by: Justin Cohen <justincohen@chromium.org>
Reviewed-by: Rohit Rao <rohitrao@chromium.org>
Commit-Queue: Rohit Rao <rohitrao@chromium.org>
Cr-Commit-Position: refs/heads/master@{#672532}

ios/chrome/browser/ui/bookmarks/bookmark_home_view_controller.mm

@@ -314,7 +314,7 @@ std::vector<GURL> GetUrlsToOpen(const std::vector<const BookmarkNode*>& nodes) {
   // same TableView.
   self.searchController =
       [[UISearchController alloc] initWithSearchResultsController:nil];
-  self.searchController.dimsBackgroundDuringPresentation = NO;
+  self.searchController.obscuresBackgroundDuringPresentation = NO;
   self.searchController.searchBar.userInteractionEnabled = NO;
   self.searchController.delegate = self;
   self.searchController.searchResultsUpdater = self;

ios/chrome/browser/ui/history/history_table_view_controller.mm

@@ -214,7 +214,7 @@ const CGFloat kButtonHorizontalPadding = 30.0;
   // TableView.
   self.searchController =
       [[UISearchController alloc] initWithSearchResultsController:nil];
-  self.searchController.dimsBackgroundDuringPresentation = NO;
+  self.searchController.obscuresBackgroundDuringPresentation = NO;
   self.searchController.searchBar.delegate = self;
   self.searchController.searchResultsUpdater = self;
   self.searchController.searchBar.backgroundColor = [UIColor clearColor];

ios/chrome/browser/ui/payments/payment_request_picker_view_controller.mm

@@ -108,7 +108,7 @@ NSString* const kPaymentRequestPickerSearchBarAccessibilityID =
   self.searchController =
       [[UISearchController alloc] initWithSearchResultsController:nil];
   self.searchController.searchResultsUpdater = self;
-  self.searchController.dimsBackgroundDuringPresentation = NO;
+  self.searchController.obscuresBackgroundDuringPresentation = NO;
   self.searchController.hidesNavigationBarDuringPresentation = NO;
   self.searchController.searchBar.accessibilityIdentifier =
       kPaymentRequestPickerSearchBarAccessibilityID;

ios/chrome/browser/ui/settings/language/add_language_table_view_controller.mm

@@ -92,7 +92,7 @@ typedef NS_ENUM(NSInteger, ItemType) {
   // Search controller.
   self.searchController =
       [[UISearchController alloc] initWithSearchResultsController:nil];
-  self.searchController.dimsBackgroundDuringPresentation = NO;
+  self.searchController.obscuresBackgroundDuringPresentation = NO;
   self.searchController.searchResultsUpdater = self;
   self.searchController.searchBar.accessibilityIdentifier =
       kAddLanguageSearchControllerAccessibilityIdentifier;

ios/showcase/core/showcase_view_controller.mm

@@ -66,7 +66,7 @@ NSString* const kUseCaseKey = @"useCase";
   self.searchController =
       [[UISearchController alloc] initWithSearchResultsController:nil];
   self.searchController.searchResultsUpdater = self;
-  self.searchController.dimsBackgroundDuringPresentation = NO;
+  self.searchController.obscuresBackgroundDuringPresentation = NO;
   self.tableView.tableHeaderView = self.searchController.searchBar;
   self.navigationController.navigationBar.translucent = NO;