Upstream code and resources for Chrome on iOS extensions.

ios/chrome/share_extension/ui_util.h

+// 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_SHARE_EXTENSION_UI_UTIL_H_
+#define IOS_CHROME_SHARE_EXTENSION_UI_UTIL_H_
+
+namespace ui_util {
+
+// Returns the closest pixel-aligned value less than |value|, taking the scale
+// factor into account. At a scale of 1, equivalent to floor().
+CGFloat AlignValueToPixel(CGFloat value);
+
+// Creates constraints so that |filler| fills entirely |container| and make them
+// active.
+void ConstrainAllSidesOfViewToView(UIView* container, UIView* filler);
+
+}  // namespace ui_util
+
+#endif  // IOS_CHROME_SHARE_EXTENSION_UI_UTIL_H_