[ios showcase] Integrated TextBadgeView with Showcase.

ios/showcase/text_badge_view/sc_text_badge_view_egtest.mm

Index: ios/showcase/text_badge_view/sc_text_badge_view_egtest.mm
diff --git a/ios/showcase/text_badge_view/sc_text_badge_view_egtest.mm b/ios/showcase/text_badge_view/sc_text_badge_view_egtest.mm
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+++ b/ios/showcase/text_badge_view/sc_text_badge_view_egtest.mm
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+// 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 <EarlGrey/EarlGrey.h>
+
+#import "ios/showcase/test/showcase_eg_utils.h"
+#import "ios/showcase/test/showcase_test_case.h"
+
+#if !defined(__has_feature) || !__has_feature(objc_arc)
+#error "This file requires ARC support."
+#endif
+
+namespace {
+using ::showcase_utils::Open;
+using ::showcase_utils::Close;
+}
+
+@interface TextBadgeViewTestCase : ShowcaseTestCase
+@end
+
+@implementation TextBadgeViewTestCase
+
+// Tests that the accessibility label matches the display text.
+- (void)testTextBadgeAccessibilityLabel {
+  Open(@"TextBadgeView");
+  Close();
+}
+
+@end