Add time from navigation_start to NTP LogEvent

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

 // 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.
 
 #include "chrome/browser/ui/webui/ntp/ntp_user_data_logger.h"
 
 #include "base/metrics/histogram.h"
 #include "base/strings/stringprintf.h"
 #include "base/strings/utf_string_conversions.h"
 #include "chrome/browser/search/most_visited_iframe_source.h"
@@ skipping 109 matching lines @@
     number_of_thumbnail_errors_ = 0;
     UMA_HISTOGRAM_NTP_TILES("NewTabPage.NumberOfGrayTileFallbacks",
                             number_of_gray_tile_fallbacks_);
     number_of_gray_tile_fallbacks_ = 0;
     UMA_HISTOGRAM_NTP_TILES("NewTabPage.NumberOfExternalTileFallbacks",
                             number_of_external_tile_fallbacks_);
     number_of_external_tile_fallbacks_ = 0;
   }
 }
 
-void NTPUserDataLogger::LogEvent(NTPLoggingEventType event) {
+void NTPUserDataLogger::LogEvent(NTPLoggingEventType event,
+                                 base::TimeDelta time) {
   switch (event) {
     case NTP_SERVER_SIDE_SUGGESTION:
       has_server_side_suggestions_ = true;
       break;
     case NTP_CLIENT_SIDE_SUGGESTION:
       // We should never get a mix of server and client side suggestions,
       // otherwise there could be a race condition depending on the order in
       // which the iframes call this method.
       DCHECK(!has_server_side_suggestions_);
       break;
@@ skipping 90 matching lines @@
       has_server_side_suggestions_(false),
       number_of_tiles_(0),
       number_of_thumbnail_tiles_(0),
       number_of_gray_tiles_(0),
       number_of_external_tiles_(0),
       number_of_thumbnail_errors_(0),
       number_of_gray_tile_fallbacks_(0),
       number_of_external_tile_fallbacks_(0),
       number_of_mouseovers_(0) {
 }