Use MDCTypography instead of MDFRobotoFontLoader directly.

ios/chrome/browser/ui/autofill/storage_switch_tooltip.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/autofill/storage_switch_tooltip.h"
 
 #include "base/logging.h"
 #include "components/strings/grit/components_strings.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"
 
 #if !defined(__has_feature) || !__has_feature(objc_arc)
 #error "This file requires ARC support."
 #endif
 
 namespace {
 
 const CGFloat kCornerRadius = 2.0f;
-const CGFloat kFontSize = 12.0f;
 const CGFloat kInset = 8.0f;
 
 }  // namespace
 
 @implementation StorageSwitchTooltip
 
 - (instancetype)initWithFrame:(CGRect)frame {
   self = [super initWithFrame:frame];
   if (self) {
     NSString* tooltipText =
         l10n_util::GetNSString(IDS_AUTOFILL_CARD_UNMASK_PROMPT_STORAGE_TOOLTIP);
     [self setText:tooltipText];
     [self setTextColor:[UIColor whiteColor]];
     [self setBackgroundColor:[UIColor colorWithWhite:0.0 alpha:0.9]];
     [[self layer] setCornerRadius:kCornerRadius];
     [[self layer] setMasksToBounds:YES];
-    [self setFont:[[MDFRobotoFontLoader sharedInstance]
-                      regularFontOfSize:kFontSize]];
+    [self setFont:[MDCTypography captionFont]];
     [self setNumberOfLines:0];  // Allows multi-line layout.
   }
   return self;
 }
 
 - (instancetype)init {
   return [self initWithFrame:CGRectZero];
 }
 
 - (instancetype)initWithCoder:(NSCoder*)aDecoder {
@@ skipping 17 matching lines @@
 
   return rect;
 }
 
 - (void)drawTextInRect:(CGRect)rect {
   UIEdgeInsets insets = {kInset, kInset, kInset, kInset};
   [super drawTextInRect:UIEdgeInsetsInsetRect(rect, insets)];
 }
 
 @end