DevTools: make disable javascript setting temporary

third_party/WebKit/Source/devtools/front_end/shell/TestShell.js

Index: third_party/WebKit/Source/devtools/front_end/shell/TestShell.js
diff --git a/third_party/WebKit/Source/devtools/front_end/shell/TestShell.js b/third_party/WebKit/Source/devtools/front_end/shell/TestShell.js
index fa844293c38f04d9be0a1035260d1fc616a3a0c0..cfd771559a7f36eaf9861cf50d7c3600dcdb15ec 100644
--- a/third_party/WebKit/Source/devtools/front_end/shell/TestShell.js
+++ b/third_party/WebKit/Source/devtools/front_end/shell/TestShell.js
@@ -19,7 +19,8 @@ Shell.TestShell = class {
         InspectorFrontendHost.clearPreferences);
     var storagePrefix = '';
     var localStorage = new Common.SettingsStorage({}, undefined, undefined, undefined, storagePrefix);
-    Common.settings = new Common.Settings(globalStorage, localStorage);
+    var sessionStorage = new Common.SettingsStorage({}, undefined, undefined, undefined, storagePrefix);
+    Common.settings = new Common.Settings(globalStorage, localStorage, sessionStorage);
 
     UI.viewManager = new UI.ViewManager();
     UI.initializeUIUtils(document, Common.settings.createSetting('uiTheme', 'default'));