Fix for URL opening code

chrome/browser/metrics/chrome_browser_main_extra_parts_metrics.h

 // Copyright (c) 2013 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_METRICS_CHROME_BROWSER_MAIN_EXTRA_PARTS_METRICS_H_
 #define CHROME_BROWSER_METRICS_CHROME_BROWSER_MAIN_EXTRA_PARTS_METRICS_H_
 
 #include <stdint.h>
 
 #include <memory>
 
 #include "base/compiler_specific.h"
 #include "base/macros.h"
 #include "build/build_config.h"
 #include "chrome/browser/chrome_browser_main_extra_parts.h"
+#include "chrome/browser/ui/tabs/tab_strip_model_observer.h"
 #include "ui/display/display_observer.h"
 
 class ChromeBrowserMainParts;
 
 namespace chrome {
 void AddMetricsExtraParts(ChromeBrowserMainParts* main_parts);
 }
 
 namespace ui {
 class InputDeviceEventObserver;
 }  // namespace ui
 
 class ChromeBrowserMainExtraPartsMetrics : public ChromeBrowserMainExtraParts,
-                                           public display::DisplayObserver {
+                                           public display::DisplayObserver,
+                                           public TabStripModelObserver {
  public:
   ChromeBrowserMainExtraPartsMetrics();
   ~ChromeBrowserMainExtraPartsMetrics() override;
 
   // Overridden from ChromeBrowserMainExtraParts:
   void PreProfileInit() override;
   void PreBrowserStart() override;
   void PostBrowserStart() override;
 
+  // Overridden from TabStripModelObserver:
+  void TabInsertedAt(TabStripModel* tab_strip_model,
+                     content::WebContents* contents,
+                     int index,
+                     bool foreground) override;
+
  private:
 #if defined(OS_MACOSX)
   // Records Mac specific metrics.
   void RecordMacMetrics();
 #endif  // defined(OS_MACOSX)
 
   // DisplayObserver overrides.
   void OnDisplayAdded(const display::Display& new_display) override;
   void OnDisplayRemoved(const display::Display& old_display) override;
   void OnDisplayMetricsChanged(const display::Display& display,
@@ skipping 10 matching lines @@
   bool is_screen_observer_;
 
 #if defined(USE_OZONE) || defined(USE_X11)
   std::unique_ptr<ui::InputDeviceEventObserver> input_device_event_observer_;
 #endif  // defined(USE_OZONE) || defined(USE_X11)
 
   DISALLOW_COPY_AND_ASSIGN(ChromeBrowserMainExtraPartsMetrics);
 };
 
 #endif  // CHROME_BROWSER_METRICS_CHROME_BROWSER_MAIN_EXTRA_PARTS_METRICS_H_