Upstream Chrome on iOS source code [5/11].

ios/chrome/browser/ui/ntp/centering_scrollview.h

Index: ios/chrome/browser/ui/ntp/centering_scrollview.h
diff --git a/ios/chrome/browser/ui/ntp/centering_scrollview.h b/ios/chrome/browser/ui/ntp/centering_scrollview.h
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index 0000000000000000000000000000000000000000..3081cf75bb5ba85a3a3dbd764d9b5770929c68fa
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+++ b/ios/chrome/browser/ui/ntp/centering_scrollview.h
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+// Copyright 2012 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_NTP_CENTERING_SCROLLVIEW_H_
+#define IOS_CHROME_BROWSER_UI_NTP_CENTERING_SCROLLVIEW_H_
+
+#import <UIKit/UIKit.h>
+
+// A CenteringScrollView is a UIScrollView that re-centers its one and only
+// content subview.
+// If the scroll view is larger than the content subview, the content subview
+// will be placed in the center of the scroll view and the scroll view will not
+// be scrollable. If the scroll view frame is smaller than the content subview,
+// the content view  will be placed flushed to the top-left edge and the
+// scroll view will be scrollable.
+@interface CenteringScrollView : UIScrollView
+
+@end
+
+#endif  // IOS_CHROME_BROWSER_UI_NTP_CENTERING_SCROLLVIEW_H_