Use MDCTypography instead of MDFRobotoFontLoader directly.

ios/chrome/browser/ui/collection_view/cells/collection_view_switch_item.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/browser/ui/collection_view/cells/collection_view_switch_item.h"
 
 #import "ios/chrome/browser/ui/colors/MDCPalette+CrAdditions.h"
 #include "ios/chrome/grit/ios_strings.h"
 #import "ios/third_party/material_components_ios/src/components/Palettes/src/MaterialPalettes.h"
-#import "ios/third_party/material_roboto_font_loader_ios/src/src/MaterialRobotoFontLoader.h"
+#import "ios/third_party/material_components_ios/src/components/Typography/src/MaterialTypography.h"
 #include "ui/base/l10n/l10n_util_mac.h"
 
 #if !defined(__has_feature) || !__has_feature(objc_arc)
 #error "This file requires ARC support."
 #endif
 
 namespace {
 // Padding used on the leading and trailing edges of the cell.
 const CGFloat kHorizontalPadding = 16;
 
@@ skipping 39 matching lines @@
 
 - (instancetype)initWithFrame:(CGRect)frame {
   self = [super initWithFrame:frame];
   if (self) {
     self.isAccessibilityElement = YES;
 
     _textLabel = [[UILabel alloc] init];
     _textLabel.translatesAutoresizingMaskIntoConstraints = NO;
     [self.contentView addSubview:_textLabel];
 
-    _textLabel.font =
-        [[MDFRobotoFontLoader sharedInstance] mediumFontOfSize:14];
+    _textLabel.font = [MDCTypography body2Font];
     _textLabel.textColor = [[MDCPalette greyPalette] tint900];
     _textLabel.numberOfLines = 0;
 
     _switchView = [[UISwitch alloc] initWithFrame:CGRectZero];
     _switchView.translatesAutoresizingMaskIntoConstraints = NO;
     _switchView.onTintColor = [[MDCPalette cr_bluePalette] tint500];
     _switchView.accessibilityHint = l10n_util::GetNSString(
         IDS_IOS_TOGGLE_SETTING_SWITCH_ACCESSIBILITY_HINT);
     [self.contentView addSubview:_switchView];
 
@@ skipping 72 matching lines @@
 
 - (NSString*)accessibilityValue {
   if (_switchView.on) {
     return l10n_util::GetNSString(IDS_IOS_SETTING_ON);
   } else {
     return l10n_util::GetNSString(IDS_IOS_SETTING_OFF);
   }
 }
 
 @end