[DevTools] Show LastModified and ResponseTime of ServiceWorker script in DevTools

Source/devtools/front_end/resources/ServiceWorkersView.js

Index: Source/devtools/front_end/resources/ServiceWorkersView.js
diff --git a/Source/devtools/front_end/resources/ServiceWorkersView.js b/Source/devtools/front_end/resources/ServiceWorkersView.js
index eec898427161a22f3e1aff240945e0e72381c694..e3095b8e7095f4cf42c25b76a7243d2aa7037ad4 100644
--- a/Source/devtools/front_end/resources/ServiceWorkersView.js
+++ b/Source/devtools/front_end/resources/ServiceWorkersView.js
@@ -321,6 +321,20 @@ WebInspector.SWRegistrationElement.prototype = {
                 inspectButton.createTextChild(WebInspector.UIString("inspect"));
                 inspectButton.addEventListener("click", this._inspectButtonClicked.bind(this, version.id), false);
             }
+
+            if (version.scriptLastModified) {
+                var scriptLastModifiedDiv = scriptURLDiv.createChild("div", "service-workers-info");
+                var scriptLastModifiedText = WebInspector.UIString("Last-Modified: ") + (new Date(version.scriptLastModified * 1000)).toConsoleTime();

[dgozman, 2015/03/30 12:54:23]

WI.UIString("Last-Modified: %s", <last modified value>)

[horo, 2015/03/30 15:05:40]

Done.

+                scriptLastModifiedDiv.createChild("div", "service-workers-info-icon");
+                scriptLastModifiedDiv.createChild("div", "service-workers-info-message service-worker-script-last-modified").createTextChild(scriptLastModifiedText);
+            }
+            if (version.scriptResponseTime) {

[dgozman, 2015/03/30 12:54:23]

As a user, I don't understand the "Response time" value. What does it mean?
Let's provide explanation in title, or even legend for the whole SW view.

[horo, 2015/03/30 15:05:40]

Changed to "Server response time: "

+                var scriptResponseTimeDiv = scriptURLDiv.createChild("div", "service-workers-info");
+                var scriptResponseTimeText = WebInspector.UIString("Response time: ") + (new Date(version.scriptResponseTime * 1000)).toConsoleTime();

[dgozman, 2015/03/30 12:54:23]

ditto

[horo, 2015/03/30 15:05:40]

Done.

+                scriptResponseTimeDiv.createChild("div", "service-workers-info-icon");
+                scriptResponseTimeDiv.createChild("div", "service-workers-info-message service-worker-script-response-time").createTextChild(scriptResponseTimeText);
+            }
+
             var errorMessages = version.errorMessages;
             for (var index = 0; index < errorMessages.length; ++index) {
                 var errorDiv = scriptURLDiv.createChild("div", "service-workers-error");
@@ -334,6 +348,7 @@ WebInspector.SWRegistrationElement.prototype = {
                     script_path = String.sprintf("%s:%d", script_path, errorMessages[index].lineNumber);
                 errorDiv.createChild("div", "service-workers-error-line").createTextChild(script_path);
             }
+
         }
         if (!versions.length) {
             var stateRowElement = versionsElement.createChild("div", "service-workers-version-row");