[ios showcase] Integrated TextBadgeView with Showcase.

ios/showcase/text_badge_view/sc_text_badge_view_controller.mm

+// Copyright 2017 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/showcase/text_badge_view/sc_text_badge_view_controller.h"
+
+#import "ios/chrome/browser/ui/reading_list/text_badge_view.h"
+
+#if !defined(__has_feature) || !__has_feature(objc_arc)
+#error "This file requires ARC support."
+#endif
+
+@implementation SCTextBadgeViewController
+
+- (void)viewDidLoad {
+  [super viewDidLoad];
+  self.view.backgroundColor = [UIColor grayColor];
+  TextBadgeView* textBadge = [[TextBadgeView alloc] initWithText:@"TEXT"];
+  [self.view addSubview:textBadge];
+  textBadge.bounds = CGRectMake(0.0f, 0.0f, 100.0f, 100.0f);
+  textBadge.center = self.view.center;
+}
+
+@end