Include time elapsed since start of a remoting session in each log entry.

remoting/webapp/crd/js/log_to_server.js

 // 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.
 
 /**
  * @fileoverview
  * Module for sending log entries to the server.
  */
 
 'use strict';
@@ skipping 54 matching lines @@
     if (this.sessionStartTime_ == 0) {
       this.sessionStartTime_ = new Date().getTime();
     }
   }
   // Log the session state change.
   var entry = remoting.ServerLogEntry.makeClientSessionStateChange(
       state, connectionError, this.mode_);
   entry.addHostFields();
   entry.addChromeVersionField();
   entry.addWebappVersionField();
+  // Log the time taken to get to this state from the time this session started.
+  var timeToReachThisState = new Date().getTime() - this.sessionStartTime_;
+  entry.addTimeToReachStateMs(timeToReachThisState);

[Jamie, 2015/02/26 20:32:06]

This should either be added at a lower level (if you want to include it all
events--which I recommend) or you need to reinstate the elapsed time for signal
strategy progress events, otherwise this CL removes it.

[anandc, 2015/02/26 22:47:11]

Done. Move further down in this function.

   entry.addSessionIdField(this.sessionId_);
   // Maybe clear the session start time, and log the session duration.
   if (remoting.LogToServer.shouldAddDuration_(state) &&
       (this.sessionStartTime_ != 0)) {
     entry.addSessionDurationField(
         (new Date().getTime() - this.sessionStartTime_) / 1000.0);
     if (remoting.LogToServer.isEndOfSession_(state)) {
       this.sessionStartTime_ = 0;
     }
   }
@@ skipping 185 matching lines @@
 remoting.LogToServer.generateSessionId_ = function() {
   var idArray = [];
   for (var i = 0; i < remoting.LogToServer.SESSION_ID_LEN_; i++) {
     var index =
         Math.random() * remoting.LogToServer.SESSION_ID_ALPHABET_.length;
     idArray.push(
         remoting.LogToServer.SESSION_ID_ALPHABET_.slice(index, index + 1));
   }
   return idArray.join('');
 };