IDEA-108265. Now user is asked whether the project should be opened in a new frame.

platform/platform-impl/src/com/intellij/ui/win/RecentProjectApplication.java

@@ -0,0 +1,39 @@
+/*
+ * Copyright 2000-2013 JetBrains s.r.o.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.intellij.ui.win;
+
+import com.intellij.ide.impl.ProjectUtil;
+import com.intellij.openapi.diff.ApplicationStarterBase;
+
+
+/**
+ * @author Denis Fokin
+ */
+public class RecentProjectApplication extends ApplicationStarterBase {
+  public RecentProjectApplication() {
+    super("reopen", 1);
+  }
+
+  @Override
+  public String getUsageMessage() {
+    return String.format("This command is used for internal purpose only.");
+  }
+
+  @Override
+  protected void processCommand(String[] args) throws Exception {
+    ProjectUtil.openProject(args[1], null, false);
+  }
+}

platform/platform-impl/src/com/intellij/ui/win/SocketControlHelper.java

@@ -46,7 +46,7 @@ public class SocketControlHelper {
       DataOutputStream out = new DataOutputStream(socket.getOutputStream());
       try {
 
-        out.writeUTF(ACTIVATE_COMMAND + new File(".").getAbsolutePath() + "\0" + pathToProject);
+        out.writeUTF(ACTIVATE_COMMAND + new File(".").getAbsolutePath() + "\0" + "reopen" + "\0" + pathToProject);
         out.flush();
         String response = in.readUTF();
         if (response.equals("ok")) {

platform/platform-resources/src/META-INF/PlatformExtensions.xml

@@ -3,6 +3,7 @@
     <errorHandler implementation="com.intellij.diagnostic.ITNReporter"/>
     <appStarter implementation="com.intellij.openapi.diff.DiffApplication"/>
     <appStarter implementation="com.intellij.openapi.diff.MergeApplication"/>
+    <appStarter implementation="com.intellij.ui.win.RecentProjectApplication"/>
     <appStarter implementation="com.intellij.help.impl.KeymapGenerator"/>
 
     <applicationService serviceInterface="com.intellij.ide.util.PropertiesComponent"