Redoing Issue 36073011: Allowing file:/// in Instant Extended's Most Visited links.

chrome/browser/ui/webui/ntp/ntp_user_data_logger.h

 // Copyright 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_UI_WEBUI_NTP_NTP_USER_DATA_LOGGER_H_
 #define CHROME_BROWSER_UI_WEBUI_NTP_NTP_USER_DATA_LOGGER_H_
 
+#include <string>
+
+#include "base/strings/string16.h"
 #include "chrome/common/ntp_logging_events.h"
 #include "content/public/browser/web_contents_observer.h"
 #include "content/public/browser/web_contents_user_data.h"
 
 namespace content {
 class WebContents;
 }
 
 // Helper class for logging data from the NTP. Attached to each NTP instance.
 class NTPUserDataLogger
     : public content::WebContentsObserver,
       public content::WebContentsUserData<NTPUserDataLogger> {
  public:
   virtual ~NTPUserDataLogger();
 
   static NTPUserDataLogger* GetOrCreateFromWebContents(
       content::WebContents* content);
 
+  // Returns the name of the histogram that should be logged for a click to a
+  // specified Most Visited |provider|.
+  static std::string GetHistogramNameForProvider(const std::string& provider);
+
   // Logs a number of statistics regarding the NTP. Called when an NTP tab is
   // about to be deactivated (be it by switching tabs, losing focus or closing
   // the tab/shutting down Chrome), or when the user navigates to a URL.
   void EmitNtpStatistics();
 
   // Called each time an event occurs on the NTP that requires a counter to be
   // incremented.
   void LogEvent(NTPLoggingEventType event);
 
   // Logs an impression on one of the Most Visited tiles by a given provider.
   void LogImpression(int position, const base::string16& provider);
 
+  // Logs a navigation on one of the Most Visited tiles by a given provider.
+  void LogNavigation(int position, const base::string16& provider);
+
   // content::WebContentsObserver override
   virtual void NavigationEntryCommitted(
       const content::LoadCommittedDetails& load_details) OVERRIDE;
 
  protected:
   explicit NTPUserDataLogger(content::WebContents* contents);
 
  private:
   friend class content::WebContentsUserData<NTPUserDataLogger>;
 
@@ skipping 32 matching lines @@
   // Total number of mouseovers for this NTP session.
   size_t number_of_mouseovers_;
 
   // The URL of this New Tab Page - varies based on NTP version.
   GURL ntp_url_;
 
   DISALLOW_COPY_AND_ASSIGN(NTPUserDataLogger);
 };
 
 #endif  // CHROME_BROWSER_UI_WEBUI_NTP_NTP_USER_DATA_LOGGER_H_