Expose PageImportanceSignals via WebContents

content/public/common/page_importance_signals.h

+// Copyright 2015 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 CONTENT_PUBLIC_COMMON_PAGE_IMPORTANCE_SIGNALS_H_
+#define CONTENT_PUBLIC_COMMON_PAGE_IMPORTANCE_SIGNALS_H_
+
+namespace content {
+
+// PageImportanceSignals contains useful signals for judging relative importance
+// of a tab. This information is provided from renderer to browser.
+// This struct is a subset of Blink's WebPageImportanceSignals, containing only
+// the signals used in Chromium side.
+struct PageImportanceSignals {
+  bool had_form_interaction;
+};
+};
+
+#endif  // CONTENT_PUBLIC_COMMON_PAGE_IMPORTANCE_SIGNALS_H_