DevTools: fix inspector/elements/css-rule-hover-highlights-selectors.html

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

 if (window.GCController)
     GCController.collectAll();
 var initialize_InspectorTest = function() {
 
 var results = [];
 
 function consoleOutputHook(messageType)
 {
     InspectorTest.addResult(messageType + ": " + Array.prototype.slice.call(arguments, 1));
 }
@@ skipping 56 matching lines @@
     var expression = "testRunner.evaluateInWebInspectorOverlay(\"(\" + " + func + " + \")()\")";
     var mainContext = InspectorTest.runtimeModel.executionContexts()[0];
     mainContext.evaluate(expression, "", false, false, true, false, false, wrapCallback);
 
     function wrapCallback(val, err, result)
     {
         callback(result.value)
     }
 }
 
+InspectorTest.waitForOverlayRepaint = function(callback)
+{
+    InspectorTest.evaluateInPageAsync("requestAnimationFrame(%callback)", callback);

[caseq, 2016/07/27 00:48:25]

Rather than using rAF, you probably want testRunner.layoutAndPaintAsyncThen()

[lushnikov, 2016/07/27 03:14:46]

I'm not sure if the layoutAndPaintAsyncThen will force raf; but afaiu rAF's are
synchronized inside the process (so requesting raf is good enough)

+}
+
+
 var lastEvalId = 0;
+var asyncCallbacks = {};
+
+InspectorTest.evaluateInPageAsync = function(string, callback)

[caseq, 2016/07/27 00:48:25]

Please don't. See invokeInPageAsync:
https://cs.chromium.org/chromium/src/third_party/WebKit/LayoutTests/http/test...

[lushnikov, 2016/07/27 03:14:46]

Beautiful. Thank you!

+{
+    var id = ++lastEvalId;
+    asyncCallbacks[id] = callback;
+    var callbackString = `testRunner.evaluateInWebInspector.bind(testRunner, ${id}, "InspectorTest._evaluateInPageAsyncCompleted(${id})")`;
+    var code = string.replace("%callback", callbackString);
+    InspectorTest.evaluateInPage(code);
+};
+
+InspectorTest._evaluateInPageAsyncCompleted = function(id)
+{
+    var callback = asyncCallbacks[id];
+    delete asyncCallbacks[id];
+    if (!callback) {
+        InspectorTest.log("Error: no callback for async function");
+        InspectorTest.completeTest();
+        return;
+    }
+    callback();
+}
+
 var pendingEvalRequests = {};
 
 var lastPromiseEvalId = 0;
 var pendingPromiseEvalRequests = {};
 
 /**
  * The given function should take two callback paraters before the arguments:
  *  * resolve - called when successful (with optional result)
  *  * reject  - called when there was a failure (with optional error)
  */
@@ skipping 1125 matching lines @@
     _output("[page] " + text);
 }
 
 function _output(result)
 {
     if (!outputElement)
         createOutputElement();
     outputElement.appendChild(document.createTextNode(result));
     outputElement.appendChild(document.createElement("br"));
 }