DevTools: improve test infrastructure w/ devtools driving the test

third_party/WebKit/Source/devtools/front_end/main/Main.js

Index: third_party/WebKit/Source/devtools/front_end/main/Main.js
diff --git a/third_party/WebKit/Source/devtools/front_end/main/Main.js b/third_party/WebKit/Source/devtools/front_end/main/Main.js
index f638ac8bd54d555b10eb99d76740fcdcfbea665a..1324e7102b388ad0539f35f3f684935db575a9ed 100644
--- a/third_party/WebKit/Source/devtools/front_end/main/Main.js
+++ b/third_party/WebKit/Source/devtools/front_end/main/Main.js
@@ -122,6 +122,10 @@ Main.Main = class {
 
     Runtime.experiments.cleanUpStaleExperiments();
 
+    var test = Runtime.queryParam('test');
+    if (test && test.indexOf('/devtools-js/') !== -1)
+      Runtime.experiments.enableForTest('releaseNote');
+
     if (Host.isUnderTest(prefs)) {
       var testPath = JSON.parse(prefs['testPath'] || '""');
       // Enable experiments for testing.
@@ -142,7 +146,7 @@ Main.Main = class {
    * @suppressGlobalPropertiesCheck
    */
   _createAppUI() {
-    console.time('Main._createAppUI');
+    Main.time('Main._createAppUI');
 
     UI.viewManager = new UI.ViewManager();
 
@@ -212,7 +216,7 @@ Main.Main = class {
     new Main.Main.InspectorDomainObserver();
 
     self.runtime.extension(Common.AppProvider).instance().then(this._showAppUI.bind(this));
-    console.timeEnd('Main._createAppUI');
+    Main.timeEnd('Main._createAppUI');
   }
 
   /**
@@ -220,7 +224,7 @@ Main.Main = class {
    * @suppressGlobalPropertiesCheck
    */
   _showAppUI(appProvider) {
-    console.time('Main._showAppUI');
+    Main.time('Main._showAppUI');
     var app = /** @type {!Common.AppProvider} */ (appProvider).createApp();
     // It is important to kick controller lifetime after apps are instantiated.
     Components.dockController.initialize();
@@ -259,17 +263,17 @@ Main.Main = class {
 
     // Allow UI cycles to repaint prior to creating connection.
     setTimeout(this._initializeTarget.bind(this), 0);
-    console.timeEnd('Main._showAppUI');
+    Main.timeEnd('Main._showAppUI');
   }
 
   _initializeTarget() {
-    console.time('Main._initializeTarget');
+    Main.time('Main._initializeTarget');
     SDK.targetManager.connectToMainTarget(webSocketConnectionLost);
 
     InspectorFrontendHost.readyForTest();
     // Asynchronously run the extensions.
     setTimeout(this._lateInitialization.bind(this), 100);
-    console.timeEnd('Main._initializeTarget');
+    Main.timeEnd('Main._initializeTarget');
 
     function webSocketConnectionLost() {
       if (!Main._disconnectedScreenWithReasonWasShown)