Upstream Chrome on iOS source code [8/11].

ios/chrome/browser/ui/stack_view/close_button.h

Index: ios/chrome/browser/ui/stack_view/close_button.h
diff --git a/ios/chrome/browser/ui/stack_view/close_button.h b/ios/chrome/browser/ui/stack_view/close_button.h
new file mode 100644
index 0000000000000000000000000000000000000000..a48823788e983baacbf9797cc11d6f5f67f52604
--- /dev/null
+++ b/ios/chrome/browser/ui/stack_view/close_button.h
@@ -0,0 +1,20 @@
+// Copyright 2014 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_STACK_VIEW_CLOSE_BUTTON_H_
+#define IOS_CHROME_BROWSER_UI_STACK_VIEW_CLOSE_BUTTON_H_
+
+#import <UIKit/UIKit.h>
+
+// A button class for the close tab button. Partially implements
+// UIAccessibilityFocus protocol to enable proper VoiceOver scrolling behavior.
+// On its target, has action for when it receives focus from VoiceOver.
+@interface CloseButton : UIButton
+
+- (void)addAccessibilityElementFocusedTarget:(id)accessibilityTarget
+                                      action:(SEL)accessibilityAction;
+
+@end
+
+#endif  // IOS_CHROME_BROWSER_UI_STACK_VIEW_CLOSE_BUTTON_H_