Add common page filtering logic for page load metrics.

chrome/renderer/page_load_metrics/renderer_page_tracker_predicate.h

Index: chrome/renderer/page_load_metrics/renderer_page_tracker_predicate.h
diff --git a/chrome/renderer/page_load_metrics/renderer_page_tracker_predicate.h b/chrome/renderer/page_load_metrics/renderer_page_tracker_predicate.h
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index 0000000000000000000000000000000000000000..4848d2aa51adbf5027254f2a0df4ace66b434bda
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+// 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_TRACKER_PREDICATE_H_
+#define CHROME_RENDERER_PAGE_LOAD_METRICS_RENDERER_PAGE_TRACKER_PREDICATE_H_
+
+#include "base/macros.h"
+#include "chrome/common/page_load_metrics/page_tracker_predicate.h"
+
+namespace blink {
+class WebDocument;
+class WebURLResponse;
+}  // namespace blink
+
+namespace page_load_metrics {
+
+class RendererPageTrackerPredicate : public PageTrackerPredicate {
+ public:
+  // document and url_response are not owned by RendererPageTrackerPredicate,
+  // and must outlive the RendererPageTrackerPredicate.
+  RendererPageTrackerPredicate(const blink::WebDocument* document,
+                               const blink::WebURLResponse* url_response);
+  ~RendererPageTrackerPredicate() override;
+
+  bool HasCommitted() override;
+  bool IsHTTPOrHTTPSUrl() override;
+  bool IsNewTabPageUrl() override;
+  bool IsChromeErrorPage() override;
+  bool IsNetworkErrorPage() override;
+  bool IsHTMLOrXHTMLPage() override;
+
+ private:
+  const blink::WebDocument* const document_;
+  const blink::WebURLResponse* const url_response_;
+
+  DISALLOW_COPY_AND_ASSIGN(RendererPageTrackerPredicate);
+};
+
+}  // namespace page_load_metrics
+
+#endif  // CHROME_RENDERER_PAGE_LOAD_METRICS_RENDERER_PAGE_TRACKER_PREDICATE_H_