Remove the iOS QR Code scanner experiment code.

ios/chrome/app/spotlight/actions_spotlight_manager.mm

 // Copyright 2016 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/app/spotlight/actions_spotlight_manager.h"
 
 #import <CoreSpotlight/CoreSpotlight.h>
 
 #include "base/ios/weak_nsobject.h"
 #include "base/mac/foundation_util.h"
@@ skipping 142 matching lines @@
           NSString* newTabTitle =
               l10n_util::GetNSString(IDS_IOS_APPLICATION_SHORTCUT_NEWTAB_TITLE);
           NSString* newTabAction =
               base::SysUTF8ToNSString(spotlight::kSpotlightActionNewTab);
 
           NSString* incognitoTitle = l10n_util::GetNSString(
               IDS_IOS_APPLICATION_SHORTCUT_NEWINCOGNITOTAB_TITLE);
           NSString* incognitoAction = base::SysUTF8ToNSString(
               spotlight::kSpotlightActionNewIncognitoTab);
 
-          NSMutableArray* spotlightItems = [NSMutableArray
-              arrayWithObjects:[strongSelf getItemForAction:voiceSearchAction
-                                                      title:voiceSearchTitle],
-                               [strongSelf getItemForAction:newTabAction
-                                                      title:newTabTitle],
-                               [strongSelf getItemForAction:incognitoAction
-                                                      title:incognitoTitle],
-                               nil];
+          NSString* qrScannerTitle = l10n_util::GetNSString(
+              IDS_IOS_APPLICATION_SHORTCUT_QR_SCANNER_TITLE);
+          NSString* qrScannerAction =
+              base::SysUTF8ToNSString(spotlight::kSpotlightActionQRScanner);
 
-          if (experimental_flags::IsQRCodeReaderEnabled()) {
-            NSString* qrScannerTitle = l10n_util::GetNSString(
-                IDS_IOS_APPLICATION_SHORTCUT_QR_SCANNER_TITLE);
-            NSString* qrScannerAction =
-                base::SysUTF8ToNSString(spotlight::kSpotlightActionQRScanner);
-
-            [spotlightItems
-                addObject:[strongSelf getItemForAction:qrScannerAction
-                                                 title:qrScannerTitle]];
-          }
+          NSArray* spotlightItems = @[
+            [strongSelf getItemForAction:voiceSearchAction
+                                   title:voiceSearchTitle],
+            [strongSelf getItemForAction:newTabAction title:newTabTitle],
+            [strongSelf getItemForAction:incognitoAction title:incognitoTitle],
+            [strongSelf getItemForAction:qrScannerAction title:qrScannerTitle],
+            nil

[sdefresne, 2017/02/03 15:47:28]

NSArray cannot store "nil" IIRC. Remove.

+          ];
 
           [[CSSearchableIndex defaultSearchableIndex]
               indexSearchableItems:spotlightItems
                  completionHandler:nil];
         });
   }];
 }
 
 - (CSSearchableItem*)getItemForAction:(NSString*)action title:(NSString*)title {
   base::scoped_nsobject<CSSearchableItemAttributeSet> attributeSet(
       [[CSSearchableItemAttributeSet alloc]
           initWithItemContentType:spotlight::StringFromSpotlightDomain(
                                       spotlight::DOMAIN_ACTIONS)]);
   [attributeSet setTitle:title];
   [attributeSet setDisplayName:title];
 
   NSString* domainID =
       spotlight::StringFromSpotlightDomain(spotlight::DOMAIN_ACTIONS);
   NSString* itemID = [NSString stringWithFormat:@"%@.%@", domainID, action];
 
   return [self spotlightItemWithItemID:itemID attributeSet:attributeSet];
 }
 
 @end