Add feature extraction for distillability to Blink

third_party/WebKit/Source/core/dom/DocumentStatisticsCollector.h

Index: third_party/WebKit/Source/core/dom/DocumentStatisticsCollector.h
diff --git a/third_party/WebKit/Source/core/dom/DocumentStatisticsCollector.h b/third_party/WebKit/Source/core/dom/DocumentStatisticsCollector.h
new file mode 100644
index 0000000000000000000000000000000000000000..2fd39c9b656e0da15ca8ec332cfbe2a58c4bb3d5
--- /dev/null
+++ b/third_party/WebKit/Source/core/dom/DocumentStatisticsCollector.h
@@ -0,0 +1,20 @@
+// 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 DocumentStatisticsCollector_h
+#define DocumentStatisticsCollector_h
+
+namespace blink {
+
+class Document;
+struct WebDistillabilityFeatures;
+
+class DocumentStatisticsCollector {
+public:
+    static WebDistillabilityFeatures collectStatistics(Document&);
+};
+
+}
+
+#endif