first incremental cut at editor without packages directories

editor/tools/plugins/com.google.dart.tools.core/src/com/google/dart/tools/core/pub/RunPubJob.java

 package com.google.dart.tools.core.pub;
 
 import com.google.dart.engine.sdk.DirectoryBasedDartSdk;
 import com.google.dart.tools.core.DartCore;
+import com.google.dart.tools.core.DartCoreDebug;
 import com.google.dart.tools.core.MessageConsole;
 import com.google.dart.tools.core.dart2js.ProcessRunner;
 import com.google.dart.tools.core.model.DartSdkManager;
 
 import org.eclipse.core.resources.IContainer;
 import org.eclipse.core.resources.IFolder;
 import org.eclipse.core.resources.IResource;
 import org.eclipse.core.resources.IncrementalProjectBuilder;
 import org.eclipse.core.runtime.CoreException;
 import org.eclipse.core.runtime.IProgressMonitor;
@@ skipping 109 matching lines @@
       // Build the process description to run pub
       DirectoryBasedDartSdk sdk = DartSdkManager.getManager().getSdk();
       File pubFile = sdk.getPubExecutable();
 
       ProcessBuilder builder = new ProcessBuilder();
       builder.directory(container.getLocation().toFile());
       builder.redirectErrorStream(true);
 
       List<String> args = new ArrayList<String>();
       args.add(pubFile.getAbsolutePath());
+      if (DartCoreDebug.NO_PUB_PACKAGES) {
+        args.add("--no-package-symlinks");
+      }
       if (command.contains(" ")) {
         String[] strings = command.split(" ");
         args.addAll(Arrays.asList(strings));
       } else {
         args.add(command);
       }
       // add flags for pub build
       if (command.equals(BUILD_COMMAND)) {
         args.add("--mode");
         args.add("debug");
@@ skipping 93 matching lines @@
   private void setDerived(IProgressMonitor monitor) {
     IFolder buildDir = container.getFolder(new Path("build"));
     try {
       ((IResource) buildDir).setDerived(true, monitor);
     } catch (CoreException e) {
       DartCore.logError("Failed to set derived flag: " + buildDir, e);
     }
   }
 
 }