[ios] TextBadgeView interface, implementation, and unit test stubs

ios/chrome/browser/ui/reading_list/text_badge_view.mm

Index: ios/chrome/browser/ui/reading_list/text_badge_view.mm
diff --git a/ios/chrome/browser/ui/reading_list/text_badge_view.mm b/ios/chrome/browser/ui/reading_list/text_badge_view.mm
new file mode 100644
index 0000000000000000000000000000000000000000..78949612aa7cfbfcf8122673891c52f8209d5bd9
--- /dev/null
+++ b/ios/chrome/browser/ui/reading_list/text_badge_view.mm
@@ -0,0 +1,18 @@
+// 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/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 TextBadgeView
+
+- (instancetype)initWithFrame:(CGRect)frame displayText:(NSString*)text {
+  self = [super initWithFrame:frame];
+  return self;
+}
+
+@end