Add common page filtering logic for page load metrics.

chrome/browser/page_load_metrics/browser_page_tracker_predicate.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_PAGE_LOAD_METRICS_BROWSER_PAGE_TRACKER_PREDICATE_H_
+#define CHROME_BROWSER_PAGE_LOAD_METRICS_BROWSER_PAGE_TRACKER_PREDICATE_H_
+
+#include "base/macros.h"
+#include "chrome/common/page_load_metrics/page_tracker_predicate.h"
+
+namespace content {
+class NavigationHandle;
+class WebContents;
+}  // namespace content
+
+namespace page_load_metrics {
+
+class PageLoadMetricsEmbedderInterface;
+
+class BrowserPageTrackerPredicate : public PageTrackerPredicate {
+ public:
+  // embedder_interface, web_contents, and navigation_handle are not owned by
+  // BrowserPageTrackerPredicate, and must outlive the
+  // BrowserPageTrackerPredicate.
+  BrowserPageTrackerPredicate(
+      PageLoadMetricsEmbedderInterface* embedder_interface,
+      content::WebContents* web_contents,
+      content::NavigationHandle* navigation_handle);
+  ~BrowserPageTrackerPredicate() override;
+
+  bool HasCommitted() override;
+  bool IsHTTPOrHTTPSUrl() override;
+  bool IsNewTabPageUrl() override;
+  bool IsChromeErrorPage() override;
+  bool IsNetworkErrorPage() override;
+  bool IsHTMLOrXHTMLPage() override;
+
+ private:
+  PageLoadMetricsEmbedderInterface* const embedder_interface_;
+  content::WebContents* const web_contents_;
+  content::NavigationHandle* const navigation_handle_;
+
+  DISALLOW_COPY_AND_ASSIGN(BrowserPageTrackerPredicate);
+};
+
+}  // namespace page_load_metrics
+
+#endif  // CHROME_BROWSER_PAGE_LOAD_METRICS_BROWSER_PAGE_TRACKER_PREDICATE_H_