Record navigations by URL scheme.

chrome/browser/tab_contents/navigation_metrics_recorder.h

+// Copyright (c) 2012 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_TAB_CONTENTS_NAVIGATION_METRICS_RECORDER_H_
+#define CHROME_BROWSER_TAB_CONTENTS_NAVIGATION_METRICS_RECORDER_H_
+
+#include "content/public/browser/web_contents_observer.h"
+
+class NavigationMetricsRecorder : public content::WebContentsObserver {
+ public:
+  explicit NavigationMetricsRecorder(content::WebContents* web_contents);
+  virtual ~NavigationMetricsRecorder();
+
+ private:
+  // content::WebContentsObserver overrides:
+  virtual void DidNavigateMainFrame(
+      const content::LoadCommittedDetails& details,
+      const content::FrameNavigateParams& params) OVERRIDE;
+
+  DISALLOW_COPY_AND_ASSIGN(NavigationMetricsRecorder);
+};
+
+#endif  // CHROME_BROWSER_TAB_CONTENTS_NAVIGATION_METRICS_RECORDER_H_