Add common page filtering logic for page load metrics.

chrome/browser/page_load_metrics/browser_page_track_decider.h

Index: chrome/browser/page_load_metrics/browser_page_track_decider.h
diff --git a/chrome/browser/page_load_metrics/browser_page_track_decider.h b/chrome/browser/page_load_metrics/browser_page_track_decider.h
new file mode 100644
index 0000000000000000000000000000000000000000..cee439fa7bb38824fa7ccbe2f89c1f1873511825
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+++ b/chrome/browser/page_load_metrics/browser_page_track_decider.h
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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_BROWSER_PAGE_LOAD_METRICS_BROWSER_PAGE_TRACK_DECIDER_H_
+#define CHROME_BROWSER_PAGE_LOAD_METRICS_BROWSER_PAGE_TRACK_DECIDER_H_
+
+#include "base/macros.h"
+#include "chrome/common/page_load_metrics/page_track_decider.h"
+
+namespace content {
+class NavigationHandle;
+class WebContents;
+}  // namespace content
+
+namespace page_load_metrics {
+
+class PageLoadMetricsEmbedderInterface;
+
+class BrowserPageTrackDecider : public PageTrackDecider {
+ public:
+  // embedder_interface, web_contents, and navigation_handle are not owned by
+  // BrowserPageTrackDecider, and must outlive the
+  // BrowserPageTrackDecider.
+  BrowserPageTrackDecider(PageLoadMetricsEmbedderInterface* embedder_interface,
+                          content::WebContents* web_contents,
+                          content::NavigationHandle* navigation_handle);
+  ~BrowserPageTrackDecider() override;
+
+  bool HasCommitted() override;
+  bool IsHttpOrHttpsUrl() override;
+  bool IsNewTabPageUrl() override;
+  bool IsChromeErrorPage() override;
+  bool IsHtmlOrXhtmlPage() override;
+  int GetHttpStatusCode() override;
+
+ private:
+  PageLoadMetricsEmbedderInterface* const embedder_interface_;
+  content::WebContents* const web_contents_;
+  content::NavigationHandle* const navigation_handle_;
+
+  DISALLOW_COPY_AND_ASSIGN(BrowserPageTrackDecider);
+};
+
+}  // namespace page_load_metrics
+
+#endif  // CHROME_BROWSER_PAGE_LOAD_METRICS_BROWSER_PAGE_TRACK_DECIDER_H_