fix for dartbug.com/11145 - run pub install for lib dir creation

editor/tools/plugins/com.google.dart.tools.ui/src/com/google/dart/tools/ui/internal/projects/CreateFolderWizard.java

Index: editor/tools/plugins/com.google.dart.tools.ui/src/com/google/dart/tools/ui/internal/projects/CreateFolderWizard.java
===================================================================
--- editor/tools/plugins/com.google.dart.tools.ui/src/com/google/dart/tools/ui/internal/projects/CreateFolderWizard.java	(revision 23812)
+++ editor/tools/plugins/com.google.dart.tools.ui/src/com/google/dart/tools/ui/internal/projects/CreateFolderWizard.java	(working copy)
@@ -98,7 +98,8 @@
     }
     // if new folder is pub white listed directory/sub-directory, run pub install
     // to create the link to packages
-    if (pubDirectories.contains(folder.getName()) || isPubDirectoryParent(folder)) {
+    if (pubDirectories.contains(folder.getName()) || isPubDirectoryParent(folder)
+        || isLibDirectory(folder)) {
       IContainer pubspecDir = getPubWorkingDir(folder);
       if (pubspecDir != null) {
         RunPubJob job = new RunPubJob(pubspecDir, RunPubJob.INSTALL_COMMAND);
@@ -121,6 +122,14 @@
     return null;
   }
 
+  private boolean isLibDirectory(IFolder folder) {
+    if (folder.getName().equals("lib")
+        && (folder.getParent().findMember(DartCore.PUBSPEC_FILE_NAME) != null)) {
+      return true;
+    }
+    return false;
+  }
+
   private boolean isPubDirectoryParent(IFolder folder) {
     IContainer parent = folder.getParent();
     while (parent != null) {