Revert of Removes Native App Launcher functionality.

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

 // 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/settings_collection_view_controller.h"
 
 #include <memory>
 
 #import "base/ios/weak_nsobject.h"
 #import "base/mac/foundation_util.h"
@@ skipping 90 matching lines @@
 };
 
 typedef NS_ENUM(NSInteger, ItemType) {
   ItemTypeSignInButton = kItemTypeEnumZero,
   ItemTypeSigninPromo,
   ItemTypeAccount,
   ItemTypeHeader,
   ItemTypeSearchEngine,
   ItemTypeSavedPasswords,
   ItemTypeAutofill,
+  ItemTypeNativeApps,
   ItemTypeVoiceSearch,
   ItemTypePrivacy,
   ItemTypeContentSettings,
   ItemTypeBandwidth,
   ItemTypeAboutChrome,
   ItemTypeMemoryDebugging,
   ItemTypeViewSource,
   ItemTypeLogJavascript,
   ItemTypeShowAutofillTypePredictions,
   ItemTypeCellCatalog,
@@ skipping 229 matching lines @@
   basicsHeader.text = l10n_util::GetNSString(IDS_IOS_OPTIONS_GENERAL_TAB_LABEL);
   basicsHeader.textColor = [[MDCPalette greyPalette] tint500];
   [model setHeader:basicsHeader
       forSectionWithIdentifier:SectionIdentifierBasics];
   [model addItem:[self searchEngineDetailItem]
       toSectionWithIdentifier:SectionIdentifierBasics];
   [model addItem:[self savePasswordsDetailItem]
       toSectionWithIdentifier:SectionIdentifierBasics];
   [model addItem:[self autoFillDetailItem]
       toSectionWithIdentifier:SectionIdentifierBasics];
+  [model addItem:[self nativeAppsDetailItem]
+      toSectionWithIdentifier:SectionIdentifierBasics];
 
   // Advanced Section
   [model addSectionWithIdentifier:SectionIdentifierAdvanced];
   CollectionViewTextItem* advancedHeader = [
       [[CollectionViewTextItem alloc] initWithType:ItemTypeHeader] autorelease];
   advancedHeader.text =
       l10n_util::GetNSString(IDS_IOS_OPTIONS_ADVANCED_TAB_LABEL);
   advancedHeader.textColor = [[MDCPalette greyPalette] tint500];
   [model setHeader:advancedHeader
       forSectionWithIdentifier:SectionIdentifierAdvanced];
@@ skipping 111 matching lines @@
                                  ? l10n_util::GetNSString(IDS_IOS_SETTING_ON)
                                  : l10n_util::GetNSString(IDS_IOS_SETTING_OFF);
   _autoFillDetailItem.reset(
       [[self detailItemWithType:ItemTypeAutofill
                            text:l10n_util::GetNSString(IDS_IOS_AUTOFILL)
                      detailText:autofillDetail] retain]);
 
   return _autoFillDetailItem;
 }
 
+- (CollectionViewItem*)nativeAppsDetailItem {
+  return [self
+      detailItemWithType:ItemTypeNativeApps
+                    text:l10n_util::GetNSString(IDS_IOS_GOOGLE_APPS_SM_SETTINGS)
+              detailText:nil];
+}
+
 - (CollectionViewItem*)voiceSearchDetailItem {
   voice::SpeechInputLocaleConfig* localeConfig =
       voice::SpeechInputLocaleConfig::GetInstance();
   voice::SpeechInputLocale locale =
       _voiceLocaleCode.GetValue().length()
           ? localeConfig->GetLocaleForCode(_voiceLocaleCode.GetValue())
           : localeConfig->GetDefaultLocale();
   NSString* languageName = base::SysUTF16ToNSString(locale.display_name);
   _voiceSearchDetailItem.reset(
       [[self detailItemWithType:ItemTypeVoiceSearch
@@ skipping 243 matching lines @@
       break;
     case ItemTypeSavedPasswords: {
       controller.reset([[SavePasswordsCollectionViewController alloc]
           initWithBrowserState:_mainBrowserState]);
       break;
     }
     case ItemTypeAutofill:
       controller.reset([[AutofillCollectionViewController alloc]
           initWithBrowserState:_mainBrowserState]);
       break;
+    case ItemTypeNativeApps:
+      controller.reset([[NativeAppsCollectionViewController alloc]
+          initWithURLRequestContextGetter:_currentBrowserState
+                                              ->GetRequestContext()]);
+      break;
     case ItemTypeVoiceSearch:
       controller.reset([[VoicesearchCollectionViewController alloc]
           initWithPrefs:_mainBrowserState->GetPrefs()]);
       break;
     case ItemTypePrivacy:
       controller.reset([[PrivacyCollectionViewController alloc]
           initWithBrowserState:_mainBrowserState]);
       break;
     case ItemTypeContentSettings:
       controller.reset([[ContentSettingsCollectionViewController alloc]
@@ skipping 379 matching lines @@
   if (signinPromoItem) {
     signinPromoItem.configurator = configurator;
     [self reconfigureCellsForItems:@[ signinPromoItem ]
            inSectionWithIdentifier:SectionIdentifierSignIn];
     if (newIdentity)
       [self.collectionViewLayout invalidateLayout];
   }
 }
 
 @end