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

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

Index: ios/chrome/browser/ui/reading_list/text_badge_view.h
diff --git a/ios/chrome/browser/ui/reading_list/text_badge_view.h b/ios/chrome/browser/ui/reading_list/text_badge_view.h
new file mode 100644
index 0000000000000000000000000000000000000000..9c695f936703ea5c0e6a1a7830c74b47e1b64707
--- /dev/null
+++ b/ios/chrome/browser/ui/reading_list/text_badge_view.h
@@ -0,0 +1,25 @@
+// 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.
+
+#ifndef IOS_CHROME_BROWSER_UI_READING_LIST_TEXT_BADGE_VIEW_H_
+#define IOS_CHROME_BROWSER_UI_READING_LIST_TEXT_BADGE_VIEW_H_
+
+#import <UIKit/UIKit.h>
+
+// Pill-shaped view that displays white text.
+@interface TextBadgeView : UIView
+
+// Initialize the text badge with the given frame and display text.
+- (instancetype)initWithFrame:(CGRect)frame

[edchin, 2017/06/28 19:54:55]

Looking at this a bit more, I think we should remove the frame and simply
have - (instancetype)initWithText:(NSString*)text; 
The reason is that the frame that is passed in will not be used at all. 
Eventually, the frame will be set again through layout constraints 
based on the intrinsic content size. 

[gchatz, 2017/06/28 20:10:17]

I assume then that you suggest passing CGRectZero into superclass constructor?

+                  displayText:(NSString*)text NS_DESIGNATED_INITIALIZER;
+
+- (instancetype)initWithFrame:(CGRect)frame NS_UNAVAILABLE;
+
+- (instancetype)initWithCoder:(NSCoder*)aDecoder NS_UNAVAILABLE;
+
+- (instancetype)init NS_UNAVAILABLE;
+
+@end
+
+#endif  // IOS_CHROME_BROWSER_UI_READING_LIST_TEXT_BADGE_VIEW_H_