Add setImmediate and clearImmediate as global function

clearImmediate has no own option as it is directly connected with setImmediate

Author: jhnns

lib/WebpackOptionsDefaulter.js

@@ -43,6 +43,7 @@ function WebpackOptionsDefaulter() {
 	this.set("node.process", true);
 	this.set("node.global", true);
 	this.set("node.Buffer", true);
+	this.set("node.setImmediate", true);
 	this.set("node.__filename", "mock");
 	this.set("node.__dirname", "mock");
 

lib/node/NodeSourcePlugin.js

@@ -48,6 +48,15 @@ NodeSourcePlugin.prototype.apply = function(compiler) {
 			return ModuleParserHelpers.addParsedVariable(this, "Buffer", "require(" + JSON.stringify(getPathToModule("buffer", bufferType)) + ").Buffer");
 		});
 	}
+	if(this.options.setImmediate) {
+		var setImmediateType = this.options.setImmediate;
+		compiler.parser.plugin("expression setImmediate", function(expr) {
+			return ModuleParserHelpers.addParsedVariable(this, "setImmediate", "require(" + JSON.stringify(getPathToModule("timers", setImmediateType)) + ").setImmediate");
+		});
+		compiler.parser.plugin("expression clearImmediate", function(expr) {
+			return ModuleParserHelpers.addParsedVariable(this, "clearImmediate", "require(" + JSON.stringify(getPathToModule("timers", setImmediateType)) + ").clearImmediate");
+		});
+	}
 	var options = this.options;
 	compiler.plugin("after-resolvers", function(compiler) {
 		var alias = {};