Add common page filtering logic for page load metrics.

chrome/renderer/page_load_metrics/renderer_page_track_decider.h

Index: chrome/renderer/page_load_metrics/renderer_page_track_decider.h
diff --git a/chrome/renderer/page_load_metrics/renderer_page_track_decider.h b/chrome/renderer/page_load_metrics/renderer_page_track_decider.h
new file mode 100644
index 0000000000000000000000000000000000000000..db5e328ec9ffe4d8629f6ffae0917bce6c32ca69
--- /dev/null
+++ b/chrome/renderer/page_load_metrics/renderer_page_track_decider.h
@@ -0,0 +1,42 @@
+// 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_RENDERER_PAGE_LOAD_METRICS_RENDERER_PAGE_TRACK_DECIDER_H_
+#define CHROME_RENDERER_PAGE_LOAD_METRICS_RENDERER_PAGE_TRACK_DECIDER_H_
+
+#include "base/macros.h"
+#include "chrome/common/page_load_metrics/page_track_decider.h"
+
+namespace blink {
+class WebDocument;
+class WebDataSource;
+}  // namespace blink
+
+namespace page_load_metrics {
+
+class RendererPageTrackDecider : public PageTrackDecider {
+ public:
+  // document and data_source are not owned by RendererPageTrackDecider,
+  // and must outlive the RendererPageTrackDecider.
+  RendererPageTrackDecider(const blink::WebDocument* document,
+                           const blink::WebDataSource* data_source);
+  ~RendererPageTrackDecider() override;
+
+  bool HasCommitted() override;
+  bool IsHTTPOrHTTPSUrl() override;
+  bool IsNewTabPageUrl() override;
+  bool IsChromeErrorPage() override;
+  bool IsHTTPErrorPage() override;
+  bool IsHTMLOrXHTMLPage() override;
+
+ private:
+  const blink::WebDocument* const document_;
+  const blink::WebDataSource* const data_source_;
+
+  DISALLOW_COPY_AND_ASSIGN(RendererPageTrackDecider);
+};
+
+}  // namespace page_load_metrics
+
+#endif  // CHROME_RENDERER_PAGE_LOAD_METRICS_RENDERER_PAGE_TRACK_DECIDER_H_