Revert of DevTools: require enabling CSS domain before running CSS.* commands.

third_party/WebKit/LayoutTests/inspector-protocol/css/pseudo-element-matching-selectors.html

Index: third_party/WebKit/LayoutTests/inspector-protocol/css/pseudo-element-matching-selectors.html
diff --git a/third_party/WebKit/LayoutTests/inspector-protocol/css/pseudo-element-matching-selectors.html b/third_party/WebKit/LayoutTests/inspector-protocol/css/pseudo-element-matching-selectors.html
index b658c98f37bf10de40a0f7b1ed7924c2ef9ef599..980b0285ceada38591759621220a0374c0d9afeb 100644
--- a/third_party/WebKit/LayoutTests/inspector-protocol/css/pseudo-element-matching-selectors.html
+++ b/third_party/WebKit/LayoutTests/inspector-protocol/css/pseudo-element-matching-selectors.html
@@ -8,37 +8,61 @@
     document.getElementById("style").textContent = "#for-pseudo:before { content: \"BEFORE\" }";
 }
 
-async function test()
+function test()
 {
     var nodeInfo = {};
     var childrenCallback;
 
     InspectorTest.eventHandler["DOM.setChildNodes"] = setChildNodes;
-    await InspectorTest.sendCommandOrDie("DOM.enable", {});
-    await InspectorTest.sendCommandOrDie("CSS.enable", {});
+    getDocument();
 
-    InspectorTest.log("\n=== Get the Document ===\n");
-    var result = await InspectorTest.sendCommandOrDie("DOM.getDocument", {});
-    var bodyId = result.root.children[0].children[1].nodeId;
+    function getDocument()
+    {
+        step({
+            name: "Get the Document",
+            command: "DOM.getDocument",
+            parameters: {},
+            callback: getImmediateChildren
+        });
+    };
 
-    InspectorTest.log("\n=== Get immediate children of the body ===\n");
-    result = await InspectorTest.sendCommandOrDie("DOM.requestChildNodes", {"nodeId": bodyId});
-    var node = findNodeById("for-pseudo");
-    var beforeNode = node.pseudoElements[0];
+    function getImmediateChildren(result)
+    {
+        var bodyId = result.root.children[0].children[1].nodeId;
+        childrenCallback = onChildrenRequested;
+        step({
+            name: "Get immediate children of the body",
+            command: "DOM.requestChildNodes",
+            parameters: {"nodeId": bodyId}
+        });
+    };
 
-    InspectorTest.log("\n=== Request matching styles for #for-pseudo::before ===\n");
-    result = await InspectorTest.sendCommandOrDie("CSS.getMatchedStylesForNode", {nodeId: beforeNode.nodeId});
-    var matchedRules = result.matchedCSSRules;
-    for (var i = 0; i < matchedRules.length; ++i) {
-        var match = matchedRules[i];
-        if (match.rule.selectorList.text === "#for-pseudo::before") {
-            InspectorTest.log("#for-pseudo::before matching the :before element: " + (match.matchingSelectors[0] === 0));
-            InspectorTest.completeTest();
-            return;
+    function onChildrenRequested()
+    {
+        var node = findNodeById("for-pseudo");
+        var beforeNode = node.pseudoElements[0];
+        step({
+            name: "Request matching styles for #for-pseudo::before",
+            command: "CSS.getMatchedStylesForNode",
+            parameters: {nodeId: beforeNode.nodeId},
+            callback: stylesReceived
+        });
+    }
+
+    function stylesReceived(result)
+    {
+        var matchedRules = result.matchedCSSRules;
+        for (var i = 0; i < matchedRules.length; ++i) {
+            var match = matchedRules[i];
+            if (match.rule.selectorList.text === "#for-pseudo::before") {
+                InspectorTest.log("#for-pseudo::before matching the :before element: " + (match.matchingSelectors[0] === 0));
+                InspectorTest.completeTest();
+                return;
+            }
         }
+        InspectorTest.log("#for-pseudo::before rule not received");
+        InspectorTest.completeTest();
     }
-    InspectorTest.log("#for-pseudo::before rule not received");
-    InspectorTest.completeTest();
 
     function setChildNodes(message)
     {
@@ -49,6 +73,18 @@
         childrenCallback = null;
         if (callback)
             callback();
+    }
+
+    function step(test)
+    {
+        InspectorTest.log("\n=== " + test.name + " ===\n");
+        InspectorTest.sendCommand(test.command, test.parameters, function(messageObject) {
+            if (messageObject.hasOwnProperty("error"))
+                InspectorTest.log("Backend error: " + messageObject.error.message + " (" + messageObject.error.code + ")\n");
+
+            if (test.callback)
+                test.callback(messageObject.result);
+        });
     }
 
     function findNodeById(id)
@@ -69,10 +105,18 @@
         return null;
     }
 
-    function addNodesRecursive(node)
+    function addNodesRecursive(root)
+    {
+        addNode(root);
+        if (!root.children)
+            return;
+        for (var i = 0; i < root.children.length; ++i)
+            addNodesRecursive(root.children[i]);
+    }
+
+    function addNode(node)
     {
         nodeInfo[node.nodeId] = node;
-        (node.children || []).forEach(addNodesRecursive);
     }
 }