add a view for users to explore pub packages

editor/tools/plugins/com.google.dart.tools.ui/src/com/google/dart/tools/ui/internal/filesview/FilesView.java

Index: editor/tools/plugins/com.google.dart.tools.ui/src/com/google/dart/tools/ui/internal/filesview/FilesView.java
===================================================================
--- editor/tools/plugins/com.google.dart.tools.ui/src/com/google/dart/tools/ui/internal/filesview/FilesView.java	(revision 27769)
+++ editor/tools/plugins/com.google.dart.tools.ui/src/com/google/dart/tools/ui/internal/filesview/FilesView.java	(working copy)
@@ -40,7 +40,6 @@
 import com.google.dart.tools.ui.internal.projects.HideProjectAction;
 import com.google.dart.tools.ui.internal.projects.OpenNewApplicationWizardAction;
 import com.google.dart.tools.ui.internal.refactoring.RefactoringUtils;
-import com.google.dart.tools.ui.internal.util.ExternalBrowserUtil;
 import com.google.dart.tools.ui.internal.util.SWTUtil;
 
 import org.eclipse.core.commands.operations.IUndoContext;
@@ -125,7 +124,11 @@
 
     @Override
     public void run() {
-      ExternalBrowserUtil.openInExternalBrowser("http://pub.dartlang.org/packages");
+        try {
+        getSite().getPage().showView("com.google.dart.tools.ui.view.packages");
+      } catch (PartInitException e) {
+        DartToolsPlugin.log(e);
+      }
     }
   }