Remove the iOS QR Code scanner experiment code.

ios/chrome/app/main_controller.mm

 // Copyright 2012 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/main_controller.h"
 
 #include <memory>
 #include <string>
 
 #import <CoreSpotlight/CoreSpotlight.h>
@@ skipping 178 matching lines @@
 NSString* const kCleanupCrashReports = @"CleanupCrashReports";
 
 // Constants for deferring the deletion of old snapshots.
 NSString* const kPurgeSnapshots = @"PurgeSnapshots";
 
 // Constants for deferring startup Spotlight bookmark indexing.
 NSString* const kStartSpotlightBookmarksIndexing =
     @"StartSpotlightBookmarksIndexing";
 
 // Constants for deferred initialization of dynamic application shortcut items.
 NSString* const kAddApplicationShortcutItems = @"AddApplicationShortcutItems";

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

Remove.

 
 // Constants for deferred promo display.
 const NSTimeInterval kDisplayPromoDelay = 0.1;
 
 // A rough estimate of the expected duration of a view controller transition
 // animation. It's used to temporarily disable mutally exclusive chrome
 // commands that trigger a view controller presentation.
 const int64_t kExpectedTransitionDurationInNanoSeconds = 0.2 * NSEC_PER_SEC;
 
 // Adapted from chrome/browser/ui/browser_init.cc.
@@ skipping 729 matching lines @@
 - (SettingsNavigationController*)settingsNavigationController {
   return _settingsNavigationController;
 }
 
 - (void)setSettingsNavigationController:
     (SettingsNavigationController*)settingsNavigationController {
   _settingsNavigationController.reset([settingsNavigationController retain]);
 }
 
 - (BOOL)startQRScannerAfterTabSwitcherDismissal {
-  return (experimental_flags::IsQRCodeReaderEnabled() &&
-          _startQRScannerAfterTabSwitcherDismissal);
+  return _startQRScannerAfterTabSwitcherDismissal;
 }
 
 - (void)setStartQRScannerAfterTabSwitcherDismissal:(BOOL)startQRScanner {
   _startQRScannerAfterTabSwitcherDismissal = startQRScanner;
 }
 
 #pragma mark - StartupInformation implementation.
 
 - (FirstUserActionRecorder*)firstUserActionRecorder {
   return _firstUserActionRecorder.get();
@@ skipping 244 matching lines @@
   // Deferred tasks.
   [self schedulePrefObserverInitialization];
   [self scheduleMemoryDebuggingTools];
   [_startupTasks scheduleDeferredBrowserStateInitialization:_mainBrowserState];
   [self scheduleAuthenticationServiceNotification];
   [self sendQueuedFeedback];
   [self scheduleSpotlightResync];
   [self scheduleDeleteDownloadsDirectory];
   [self scheduleStartupAttemptReset];
   [self scheduleFreeMemoryMonitoring];
-  [self scheduleAddApplicationShortcutItems];
   [self scheduleAppDistributionPings];
   [self scheduleCheckNativeApps];
 }
 
 - (void)scheduleTasksRequiringBVCWithBrowserState {
   if (GetApplicationContext()->WasLastShutdownClean())
     [self.mainBVC removeExternalFilesImmediately:NO completionHandler:nil];
 
   [self scheduleShowPromo];
 }
@@ skipping 11 matching lines @@
     return;
   }
   ProceduralBlock block = ^{
     [_spotlightManager resyncIndex];
   };
   [[DeferredInitializationRunner sharedInstance]
       enqueueBlockNamed:kStartSpotlightBookmarksIndexing
                   block:block];
 }
 
-- (void)scheduleAddApplicationShortcutItems {
-  ProceduralBlock block = ^{
-    if (experimental_flags::IsQRCodeReaderEnabled()) {
-      UIApplicationShortcutItem* qrScannerShortcutItem = [[
-          [UIApplicationShortcutItem alloc]
-               initWithType:@"OpenQRScanner"
-             localizedTitle:l10n_util::GetNSString(
-                                IDS_IOS_APPLICATION_SHORTCUT_QR_SCANNER_TITLE)
-          localizedSubtitle:nil
-                       icon:[UIApplicationShortcutIcon
-                                iconWithTemplateImageName:
-                                    @"quick_action_qr_scanner"]
-                   userInfo:nil] autorelease];
-      // Note: The following only affects dynamic shortcut items defined
-      // programmatically, and not static shortcut items set in the Info.plist
-      // file.
-      [[UIApplication sharedApplication]
-          setShortcutItems:@[ qrScannerShortcutItem ]];
-    } else {
-      [[UIApplication sharedApplication] setShortcutItems:nil];
-    }
-  };
-
-  [[DeferredInitializationRunner sharedInstance]
-      enqueueBlockNamed:kAddApplicationShortcutItems
-                  block:block];
-}
-
 - (void)expireFirstUserActionRecorder {
   // Clear out any scheduled calls to this method. For example, the app may have
   // been backgrounded before the |kFirstUserActionTimeout| expired.
   [NSObject
       cancelPreviousPerformRequestsWithTarget:self
                                      selector:@selector(
                                                   expireFirstUserActionRecorder)
                                        object:nil];
 
   if (_firstUserActionRecorder) {
@@ skipping 1408 matching lines @@
   };
 
   callbackCounter->IncrementCount();
   [self removeBrowsingDataFromBrowserState:_mainBrowserState
                                       mask:removeAllMask
                                 timePeriod:browsing_data::ALL_TIME
                          completionHandler:decrementCallbackCounterCount];
 }
 
 @end