Upstream Chrome on iOS source code [10/11].

ios/chrome/browser/ui/util/top_view_controller.h

Index: ios/chrome/browser/ui/util/top_view_controller.h
diff --git a/ios/chrome/browser/ui/util/top_view_controller.h b/ios/chrome/browser/ui/util/top_view_controller.h
new file mode 100644
index 0000000000000000000000000000000000000000..c0d3a3438692cc9f7a996c6b4a70d9aed9f48607
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+++ b/ios/chrome/browser/ui/util/top_view_controller.h
@@ -0,0 +1,19 @@
+// 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_BROWSER_UI_UTIL_TOP_VIEW_CONTROLLER_H_
+#define IOS_CHROME_BROWSER_UI_UTIL_TOP_VIEW_CONTROLLER_H_
+
+#import <UIKit/UIKit.h>
+
+namespace top_view_controller {
+
+UIViewController* TopPresentedViewControllerFrom(
+    UIViewController* base_view_controller);
+
+UIViewController* TopPresentedViewController();
+
+}  // namespace top_view_controller
+
+#endif  // IOS_CHROME_BROWSER_UI_UTIL_TOP_VIEW_CONTROLLER_H_