Remove the iOS QR Code scanner experiment code.

ios/chrome/browser/ui/qr_scanner/qr_scanner_view_controller_egtest.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 <AVFoundation/AVFoundation.h>
 #import <EarlGrey/EarlGrey.h>
 #import <UIKit/UIKit.h>
 
 #import "base/mac/scoped_nsobject.h"
 #include "base/strings/sys_string_conversions.h"
-#include "base/test/scoped_command_line.h"
 #include "components/strings/grit/components_strings.h"
 #include "components/version_info/version_info.h"
 #import "ios/chrome/app/main_controller.h"
 #include "ios/chrome/browser/chrome_switches.h"
 #import "ios/chrome/browser/ui/browser_view_controller.h"
 #import "ios/chrome/browser/ui/commands/generic_chrome_command.h"
 #include "ios/chrome/browser/ui/commands/ios_command_ids.h"
 #include "ios/chrome/browser/ui/icons/chrome_icon.h"
 #include "ios/chrome/browser/ui/qr_scanner/camera_controller.h"
 #include "ios/chrome/browser/ui/qr_scanner/qr_scanner_view.h"
@@ skipping 116 matching lines @@
 @interface QRScannerViewControllerTestCase : ChromeTestCase {
   GURL _testURL;
   GURL _testURLEdited;
   GURL _testQuery;
   GURL _testQueryEdited;
 }
 
 @end
 
 @implementation QRScannerViewControllerTestCase {
-  // A scoped command line to enable the QR Scanner experiment.
-  std::unique_ptr<base::test::ScopedCommandLine> scoped_command_line_;
   // A swizzler for the CameraController method cameraControllerWithDelegate:.
   std::unique_ptr<ScopedBlockSwizzler> camera_controller_swizzler_;
   // A swizzler for the WebToolbarController method
   // loadGURLFromLocationBar:transition:.
   std::unique_ptr<ScopedBlockSwizzler> load_GURL_from_location_bar_swizzler_;
 }
 
 + (void)setUp {
   [super setUp];
   std::map<GURL, std::string> responses;
   responses[web::test::HttpServer::MakeUrl(kTestURL)] = kTestURLResponse;
   responses[web::test::HttpServer::MakeUrl(kTestQueryURL)] = kTestQueryResponse;
   responses[web::test::HttpServer::MakeUrl(kTestURLEdited)] =
       kTestURLEditedResponse;
   responses[web::test::HttpServer::MakeUrl(kTestQueryEditedURL)] =
       kTestQueryEditedResponse;
   web::test::SetUpSimpleHttpServer(responses);
 }
 
 - (void)setUp {
   [super setUp];
   _testURL = web::test::HttpServer::MakeUrl(kTestURL);
   _testURLEdited = web::test::HttpServer::MakeUrl(kTestURLEdited);
   _testQuery = web::test::HttpServer::MakeUrl(kTestQueryURL);
   _testQueryEdited = web::test::HttpServer::MakeUrl(kTestQueryEditedURL);
-
-  // Enable the QR Scanner experiment.
-  scoped_command_line_.reset(new base::test::ScopedCommandLine);
-  scoped_command_line_->GetProcessCommandLine()->AppendSwitch(
-      switches::kEnableQRScanner);
 }
 
 - (void)tearDown {
   [super tearDown];
   load_GURL_from_location_bar_swizzler_.reset();
   camera_controller_swizzler_.reset();
 }
 
 // Checks that the close button is visible, interactable, and enabled.
 - (void)assertCloseButtonIsVisible {
@@ skipping 635 matching lines @@
 // Test that the correct page is loaded if the scanner result is a search query
 // which is then manually edited.
 - (void)testReceivingQRScannerSearchQueryResultAndEditingTheQuery {
   [self swizzleWebToolbarControllerLoadGURLFromLocationBar:_testQueryEdited];
   [self doTestReceivingResult:kTestQuery
                      response:kTestQueryEditedResponse
                          edit:@"\bedited"];
 }
 
 @end