pass script fetch start / end time to Transalte Element to implement real time latency monitoring

components/translate/core/browser/resources/translate.js

Index: components/translate/core/browser/resources/translate.js
diff --git a/components/translate/core/browser/resources/translate.js b/components/translate/core/browser/resources/translate.js
index 79c579342531c9bce86a66ca16d3e7a6db98738c..7dd7568bdaad685bff8a69af4672c29f7c7643d8 100644
--- a/components/translate/core/browser/resources/translate.js
+++ b/components/translate/core/browser/resources/translate.js
@@ -259,14 +259,17 @@ cr.googleTranslate = (function() {
           // translateApiKey is predefined by translate_script.cc.
           'key': translateApiKey,
           'serverParams': serverParams,
+          'timeInfo': gtTimeInfo,

[groby-ooo-7-16, 2016/08/18 22:35:04]

key is 'timeInfo' here, 'gtTimeInfo' in test - maybe a typo?

[ftang, 2016/08/18 23:01:39]

the JavaScript variable in the test is gtTimeInfo. The value appended by the
translate_script.cc is also gtTimeInfo. This JS code pass that gtTimeInfo into
the  google.translate.TranslateService() inside an object keyed 'timeInfo'. The
'timeInfo' will be later read by js code in TranslateElement (see
https://critique.corp.google.com/#review/130658595/depot/google3/googledata/t...
) 

[groby-ooo-7-16, 2016/08/19 18:20:59]

Ah, I see - thank you for the explanation.

[ftang, 2016/08/19 20:33:23]

Acknowledged.

           'useSecureConnection': true
         });
         translateApiKey = undefined;
         serverParams = undefined;
+        gtTimeInfo = undefined;
       } catch (err) {
         errorCode = ERROR['INITIALIZATION_ERROR'];
         translateApiKey = undefined;
         serverParams = undefined;
+        gtTimeInfo = undefined;
         return;
       }
       // The TranslateService is not available immediately as it needs to start