Add time from navigation_start to NTP LogEvent

chrome/browser/ui/search/search_tab_helper.h

 // Copyright 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_UI_SEARCH_SEARCH_TAB_HELPER_H_
 #define CHROME_BROWSER_UI_SEARCH_SEARCH_TAB_HELPER_H_
 
 #include <vector>
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "base/gtest_prod_util.h"
+#include "base/time/time.h"
 #include "chrome/browser/search/instant_service_observer.h"
 #include "chrome/browser/ui/search/search_ipc_router.h"
 #include "chrome/browser/ui/search/search_model.h"
 #include "chrome/common/instant_types.h"
 #include "chrome/common/ntp_logging_events.h"
 #include "chrome/common/omnibox_focus_state.h"
 #include "content/public/browser/web_contents_observer.h"
 #include "content/public/browser/web_contents_user_data.h"
 #include "ui/base/window_open_disposition.h"
 
@@ skipping 141 matching lines @@
   // Overridden from SearchIPCRouter::Delegate:
   void OnInstantSupportDetermined(bool supports_instant) override;
   void OnSetVoiceSearchSupport(bool supports_voice_search) override;
   void FocusOmnibox(OmniboxFocusState state) override;
   void NavigateToURL(const GURL& url,
                      WindowOpenDisposition disposition,
                      bool is_most_visited_item_url) override;
   void OnDeleteMostVisitedItem(const GURL& url) override;
   void OnUndoMostVisitedDeletion(const GURL& url) override;
   void OnUndoAllMostVisitedDeletions() override;
-  void OnLogEvent(NTPLoggingEventType event) override;
+  void OnLogEvent(NTPLoggingEventType event, base::TimeDelta time) override;
   void OnLogMostVisitedImpression(int position,
                                   const base::string16& provider) override;
   void OnLogMostVisitedNavigation(int position,
                                   const base::string16& provider) override;
   void PasteIntoOmnibox(const base::string16& text) override;
   void OnChromeIdentityCheck(const base::string16& identity) override;
   void OnHistorySyncCheck() override;
 
   // Overridden from InstantServiceObserver:
   void ThemeInfoChanged(const ThemeBackgroundInfo& theme_info) override;
@@ skipping 48 matching lines @@
   SearchTabHelperDelegate* delegate_;
 
   // Function to check if the omnibox has focus. Tests use this to modify the
   // default behavior.
   OmniboxHasFocusFn omnibox_has_focus_fn_;
 
   DISALLOW_COPY_AND_ASSIGN(SearchTabHelper);
 };
 
 #endif  // CHROME_BROWSER_UI_SEARCH_SEARCH_TAB_HELPER_H_