Use MDCTypography instead of MDFRobotoFontLoader directly.

ios/chrome/browser/ui/contextual_search/contextual_search_promo_view.mm

 // Copyright 2014 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/contextual_search/contextual_search_promo_view.h"
 
 #import "ios/chrome/browser/ui/colors/MDCPalette+CrAdditions.h"
 #import "ios/chrome/browser/ui/contextual_search/contextual_search_panel_view.h"
 #include "ios/chrome/browser/ui/uikit_ui_util.h"
 #import "ios/chrome/browser/ui/util/label_link_controller.h"
 #import "ios/chrome/common/material_timing.h"
 #include "ios/chrome/common/string_util.h"
 #include "ios/chrome/grit/ios_strings.h"
 #import "ios/third_party/material_components_ios/src/components/Buttons/src/MaterialButtons.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.h"
 #include "url/gurl.h"
 
 #if !defined(__has_feature) || !__has_feature(objc_arc)
 #error "This file requires ARC support."
 #endif
 
 namespace {
 const int kMargin = 16;
 const int kSpaceBelowText = 32;
 const int kButtonSeparator = 8;
 const int kButtonHeight = 36;
 const int kButtonMinWidth = 88;
 const int kDividerHeight = 1;
 
-const int kTextFontSize = 16;
-const int kButtonFontSize = 14;
 const CGFloat kTextColorGrayShade = 0.494;
 const int kLinkColorRGB = 0x5D9AFF;
 
 const CGFloat kLineSpace = 1.15;
 
 // Animation timings.
 const CGFloat kCloseDuration = ios::material::kDuration1;
 }
 
 @interface ContextualSearchPromoView ()
@@ skipping 44 matching lines @@
   NSRange linkRange;
   textString = ParseStringWithLink(textString, &linkRange);
 
   // Build style attributes for the label.
   NSMutableParagraphStyle* paragraphStyle =
       [[NSMutableParagraphStyle alloc] init];
   [paragraphStyle setLineBreakMode:NSLineBreakByWordWrapping];
   [paragraphStyle setLineHeightMultiple:kLineSpace];
   NSDictionary* attributes = @{
     NSParagraphStyleAttributeName : paragraphStyle,
-    NSFontAttributeName :
-        [[MDFRobotoFontLoader sharedInstance] regularFontOfSize:kTextFontSize],
+    NSFontAttributeName : [MDCTypography subheadFont],
     NSForegroundColorAttributeName :
         [UIColor colorWithWhite:kTextColorGrayShade alpha:1]
   };
 
   // Create and assign attributed text to label.
   NSMutableAttributedString* attributedText =
       [[NSMutableAttributedString alloc] initWithString:textString];
   [attributedText setAttributes:attributes
                           range:NSMakeRange(0, textString.length)];
   text.attributedText = attributedText;
   [_linkController addLinkWithRange:linkRange
                                 url:GURL("contextualSearch://settings")];
   text.numberOfLines = 0;
 
-  UIFont* buttonFont =
-      [[MDFRobotoFontLoader sharedInstance] mediumFontOfSize:kButtonFontSize];
+  UIFont* buttonFont = [MDCTypography buttonFont];
 
   // Create accept and decline buttons with dimensions defined by the
   // minimum height and width constants.
   MDCFlatButton* acceptButton = [[MDCFlatButton alloc] init];
   acceptButton.hasOpaqueBackground = YES;
   acceptButton.inkColor =
       [[[MDCPalette cr_bluePalette] tint300] colorWithAlphaComponent:0.5f];
   [acceptButton setBackgroundColor:[[MDCPalette cr_bluePalette] tint500]
                           forState:UIControlStateNormal];
   [acceptButton setBackgroundColor:[UIColor colorWithWhite:0.6f alpha:1.0f]
@@ skipping 126 matching lines @@
     self.hidden = NO;
   }
 }
 
 - (void)panelWillPromote:(ContextualSearchPanelView*)panel {
   _delegate = nil;
   [panel removeMotionObserver:self];
 }
 
 @end