DevTools: [CSS] promisify CSS domain

LayoutTests/inspector/inspector-backend-commands.html

Index: LayoutTests/inspector/inspector-backend-commands.html
diff --git a/LayoutTests/inspector/inspector-backend-commands.html b/LayoutTests/inspector/inspector-backend-commands.html
index 21568fa9d0f72874a14b3e0e27815b0804941b23..1adb84d5d61ab2b4c8e715bde882afca1b199658 100644
--- a/LayoutTests/inspector/inspector-backend-commands.html
+++ b/LayoutTests/inspector/inspector-backend-commands.html
@@ -71,25 +71,29 @@ function test()
     var sendMessageToBackendOriginal = InspectorFrontendHost.sendMessageToBackend;
     InspectorFrontendHost.sendMessageToBackend = sendMessageToBackendLoopback;
 
+    function defaultHandler() {
+        return Array.prototype.slice.call(arguments);
+    }
+
     var agent = WebInspector.targetManager.mainTarget().profilerAgent();
     Promise.resolve()
-        .then(function() { return processResult("commandError", agent.commandError({"message": "this is the error message"})); }) // Error: error in the protocol response
-        .then(function() { return processResult("commandArgs0", agent.commandArgs0()); })
-        .then(function() { return processResult("commandArgs0", agent.commandArgs0(1)); }) // Error: extra arg
-        .then(function() { return processResult("commandArgs1Rets0", agent.commandArgs1Rets0(123)); })
-        .then(function() { return processResult("commandArgs1Rets0", agent.commandArgs1Rets0(123, 456)); }) // Error: extra arg
-        .then(function() { return processResult("commandArgs1Rets0", agent.commandArgs1Rets0("abc")); }) // Error: wrong type
-        .then(function() { return processResult("commandArgs1Rets0", agent.commandArgs1Rets0()); }) // Error: missing arg
-        .then(function() { return processResult("commandArgs1Rets1", agent.commandArgs1Rets1({"value1": 234})); })
-        .then(function() { return processResult("commandArgs1Rets1", agent.commandArgs1Rets1({"value1": 234})); })
-        .then(function() { return processResult("commandArgs3Rets3", agent.commandArgs3Rets3({}, 345, "alph")); })
-        .then(function() { return processResult("commandArgs3Rets3", agent.commandArgs3Rets3({}, 345)); })
-        .then(function() { return processResult("commandArgs3Rets3", agent.commandArgs3Rets3({}, undefined, "alph")); })
-        .then(function() { return processResult("commandArgs3Rets3", agent.commandArgs3Rets3({}, "alph")); }) // Error: wrong type
-        .then(function() { return processResult("commandArgs3Rets3", agent.commandArgs3Rets3({})); })
-        .then(function() { return processResult("commandArgs3Rets3", agent.commandArgs3Rets3()); })  // Error: missing arg
-        .then(function() { return processResult("commandArgs3Rets3", agent.commandArgs3Rets3({}, "alph", 345)); }) // Error: wrong types
-        .then(function() { return processResult("commandArgs3Rets3", agent.commandArgs3Rets3({}, "alph", 345, 678)); }) // Error: extra arg
+        .then(function() { return processResult("commandError", agent.commandError({"message": "this is the error message"}, defaultHandler)); }) // Error: error in the protocol response
+        .then(function() { return processResult("commandArgs0", agent.commandArgs0(defaultHandler)); })
+        .then(function() { return processResult("commandArgs0", agent.commandArgs0(1, defaultHandler)); }) // Error: extra arg
+        .then(function() { return processResult("commandArgs1Rets0", agent.commandArgs1Rets0(123, defaultHandler)); })
+        .then(function() { return processResult("commandArgs1Rets0", agent.commandArgs1Rets0(123, 456, defaultHandler)); }) // Error: extra arg
+        .then(function() { return processResult("commandArgs1Rets0", agent.commandArgs1Rets0("abc", defaultHandler)); }) // Error: wrong type
+        .then(function() { return processResult("commandArgs1Rets0", agent.commandArgs1Rets0(defaultHandler)); }) // Error: missing arg
+        .then(function() { return processResult("commandArgs1Rets1", agent.commandArgs1Rets1({"value1": 234}, defaultHandler)); })
+        .then(function() { return processResult("commandArgs1Rets1", agent.commandArgs1Rets1({"value1": 234}, defaultHandler)); })
+        .then(function() { return processResult("commandArgs3Rets3", agent.commandArgs3Rets3({}, 345, "alph", defaultHandler)); })
+        .then(function() { return processResult("commandArgs3Rets3", agent.commandArgs3Rets3({}, 345, defaultHandler)); })
+        .then(function() { return processResult("commandArgs3Rets3", agent.commandArgs3Rets3({}, undefined, "alph", defaultHandler)); })
+        .then(function() { return processResult("commandArgs3Rets3", agent.commandArgs3Rets3({}, "alph", defaultHandler)); }) // Error: wrong type
+        .then(function() { return processResult("commandArgs3Rets3", agent.commandArgs3Rets3({}, defaultHandler)); })
+        .then(function() { return processResult("commandArgs3Rets3", agent.commandArgs3Rets3(defaultHandler)); })  // Error: missing arg
+        .then(function() { return processResult("commandArgs3Rets3", agent.commandArgs3Rets3({}, "alph", 345, defaultHandler)); }) // Error: wrong types
+        .then(function() { return processResult("commandArgs3Rets3", agent.commandArgs3Rets3({}, "alph", 345, 678, defaultHandler)); }) // Error: extra arg
         .then(finishTest);
 
     function finishTest()