MacViews: Remove constrained window dependencies for certificate viewer.

chrome/browser/ui/cocoa/certificate_viewer_mac_views.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 CHROME_BROWSER_UI_COCOA_CERTIFICATE_VIEWER_MAC_VIEWS_H_
+#define CHROME_BROWSER_UI_COCOA_CERTIFICATE_VIEWER_MAC_VIEWS_H_
+
+#include <memory>
+
+#import "chrome/browser/ui/cocoa/certificate_viewer_mac.h"
+
+namespace views {
+class Widget;
+class WidgetDelegateView;
+}
+
+// Certificate viewer class for MacViews which handles displaying and closing
+// the Cocoa certificate viewer.
+@interface SSLCertificateViewerViewsMac : SSLCertificateViewerMac {
+ @private
+  std::unique_ptr<views::Widget> overlayWindow_;
+}
+
+// Closes the certificate viewer properly.
+- (void)sheetDidEnd:(NSWindow*)parent
+         returnCode:(NSInteger)returnCode
+            context:(void*)context;
+
+@end
+
+#endif  // CHROME_BROWSER_UI_COCOA_CERTIFICATE_VIEWER_MAC_VIEWS_H_