DevTools: introduce persistence/ module

third_party/WebKit/LayoutTests/http/tests/inspector/persistence/persistence-test.js

+var initialize_PersistenceTest = function() {
+
+InspectorTest.preloadModule("persistence");
+InspectorTest.preloadModule("sources");
+
+WebInspector.PersistenceBinding.prototype.toString = function()
+{
+    var lines = [
+        "{",
+        "       network: " + this.network.url(),
+        "    persistent: " + this.persistent.url(),
+        "}"
+    ];
+    return lines.join("\n");
+}
+
+InspectorTest.waitForBinding = function(fileName, callback)
+{
+    var bindings = WebInspector.persistence._bindings.valuesArray();
+    for (var binding of bindings) {
+        if (binding.network.name() === fileName || binding.persistent.name() === fileName) {
+            callback(binding);
+            return;
+        }
+    }
+    WebInspector.persistence.addEventListener(WebInspector.Persistence.Events.BindingCreated, onBindingCreated);
+
+    function onBindingCreated(event)
+    {
+        var binding = event.data;
+        if (binding.network.name() !== fileName && binding.persistent.name() !== fileName)
+            return;
+        WebInspector.persistence.removeEventListener(WebInspector.Persistence.Events.BindingCreated, onBindingCreated);
+        callback(binding);
+    }
+}
+
+InspectorTest.waitForUISourceCode = function(name, projectType)
+{
+    var uiSourceCodes = WebInspector.workspace.uiSourceCodes();
+    var uiSourceCode = uiSourceCodes.find(filterCode);
+    if (uiSourceCode)
+        return Promise.resolve(uiSourceCode);
+
+    var fulfill;
+    var promise = new Promise(x => fulfill = x);
+    WebInspector.workspace.addEventListener(WebInspector.Workspace.Events.UISourceCodeAdded, onUISourceCode);
+    return promise;
+
+    function onUISourceCode(event)
+    {
+        var uiSourceCode = event.data;
+        if (!filterCode(uiSourceCode))
+            return;
+        WebInspector.workspace.removeEventListener(WebInspector.Workspace.Events.UISourceCodeAdded, onUISourceCode);
+        fulfill(uiSourceCode);
+    }
+
+    function filterCode(uiSourceCode)
+    {
+        return uiSourceCode.name() === name && uiSourceCode.project().type() === projectType;
+    }
+}
+
+}