Upstream code and resources for Chrome on iOS extensions.

ios/chrome/today_extension/notification_center_url_button.h

Index: ios/chrome/today_extension/notification_center_url_button.h
diff --git a/ios/chrome/today_extension/notification_center_url_button.h b/ios/chrome/today_extension/notification_center_url_button.h
new file mode 100644
index 0000000000000000000000000000000000000000..0147fb94e8283571c02d186f0e609b034a65739d
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+++ b/ios/chrome/today_extension/notification_center_url_button.h
@@ -0,0 +1,31 @@
+// Copyright 2016 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_TODAY_EXTENSION_NOTIFICATION_CENTER_URL_BUTTON_H_
+#define IOS_CHROME_TODAY_EXTENSION_NOTIFICATION_CENTER_URL_BUTTON_H_
+
+#import <UIKit/UIKit.h>
+
+#import "ios/chrome/today_extension/notification_center_button.h"
+
+typedef void (^URLActionBlock)(NSString*);
+
+@interface NotificationCenterURLButton : NotificationCenterButton
+
+// Create a button with contextual URL layout.
+- (instancetype)initWithTitle:(NSString*)title
+                          url:(NSString*)url
+                         icon:(NSString*)icon
+                    leftInset:(CGFloat)leftInset
+                        block:(URLActionBlock)block;
+
+// Show (or hide) a bottom separator below the button.
+- (void)setSeparatorVisible:(BOOL)visible;
+
+// Sets the title and the URL displayed in the button.
+- (void)setTitle:(NSString*)title url:(NSString*)url;
+
+@end
+
+#endif  // IOS_CHROME_TODAY_EXTENSION_NOTIFICATION_CENTER_URL_BUTTON_H_