Add perf histogram and tests for inline signin

chrome/browser/resources/gaia_auth/main.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.
 
 /**
  * Authenticator class wraps the communications between Gaia and its host.
  */
 function Authenticator() {
 }
 
@@ skipping 43 matching lines @@
     this.inputEmail_ = params.email;
     this.service_ = params.service || this.SERVICE_ID;
     this.continueUrl_ = params.continueUrl || this.CONTINUE_URL;
     this.continueUrlWithoutParams_ = stripParams(this.continueUrl_);
     this.inlineMode_ = params.inlineMode == '1';
     this.constrained_ = params.constrained == '1';
     this.partitionId_ = params.partitionId || '';
     this.initialFrameUrl_ = params.frameUrl || this.constructInitialFrameUrl_();
     this.initialFrameUrlWithoutParams_ = stripParams(this.initialFrameUrl_);
     this.loaded_ = false;
+    this.load_start_ts_ = 0;
 
     document.addEventListener('DOMContentLoaded', this.onPageLoad.bind(this));
     document.addEventListener('enableSAML', this.onEnableSAML_.bind(this));
   },
 
   isGaiaMessage_: function(msg) {
     // Not quite right, but good enough.
     return this.gaiaUrl_.indexOf(msg.origin) == 0 ||
            this.GAIA_URL.indexOf(msg.origin) == 0;
   },
@@ skipping 87 matching lines @@
       'method': 'switchToFullTab',
       'url': details.url
     };
     window.parent.postMessage(msg, this.parentPage_);
   },
 
   loadFrame_: function() {
     var gaiaFrame = $('gaia-frame');
     gaiaFrame.partition = this.partitionId_;
     gaiaFrame.src = this.initialFrameUrl_;
+    this.load_start_ts_ = Date.now();
+
     if (this.inlineMode_) {
       gaiaFrame.addEventListener(
           'loadstop', this.onWebviewLoadstop_.bind(this, gaiaFrame));
       gaiaFrame.addEventListener(
           'newwindow', this.onWebviewNewWindow_.bind(this, gaiaFrame));
     }
     if (this.constrained_) {
       gaiaFrame.request.onCompleted.addListener(
           this.onWebviewRequestCompleted_.bind(this),
           {urls: ['<all_urls>'], types: ['main_frame']},
@@ skipping 72 matching lines @@
     } else if (call.method == 'confirm') {
       if (call.token != this.apiToken_)
         console.error('Authenticator.onAPICall_: token mismatch');
     } else {
       console.error('Authenticator.onAPICall_: unknown message');
     }
   },
 
   onLoginUILoaded: function() {
     var msg = {
-      'method': 'loginUILoaded'
+      'method': 'loginUILoaded',
+      'load_start_ts': this.load_start_ts_,
+      'load_stop_ts': Date.now()
     };
     window.parent.postMessage(msg, this.parentPage_);
     if (this.inlineMode_) {
       // TODO(guohui): temporary workaround until webview team fixes the focus
       // on their side.
       var gaiaFrame = $('gaia-frame');
       gaiaFrame.focus();
       gaiaFrame.onblur = function() {
         gaiaFrame.focus();
       };
@@ skipping 90 matching lines @@
     } else if (msg.method == 'redirectToSignin' &&
                this.isParentMessage_(e)) {
       $('gaia-frame').src = this.constructInitialFrameUrl_();
     } else {
        console.error('Authenticator.onMessage: unknown message + origin!?');
     }
   }
 };
 
 Authenticator.getInstance().initialize();