Add a top-level node in the Files view to display the SDK libraries.

editor/tools/plugins/com.google.dart.tools.core/src/com/google/dart/tools/core/internal/model/EditorLibraryManager.java

 /*
  * Copyright 2011 Dart project authors.
  * 
  * Licensed under the Eclipse Public License v1.0 (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.eclipse.org/legal/epl-v10.html
  * 
  * 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
@@ skipping 34 matching lines @@
    */
   public Collection<String> getAllLibrarySpecs() {
     Collection<String> result = new ArrayList<String>(libraries.size());
     for (SystemLibrary lib : libraries) {
       result.add("dart:" + lib.getShortName());
     }
     return result;
   }
 
   /**
+   * Answer the directory containing the library folders. Typically this would be the "dart-sdk/lib"
+   * directory.
+   * 
+   * <pre>
+   * install-directory/
+   *    dart-sdk/
+   *       lib/
+   *          core/
+   *             core_runtime.dart
+   *             core_frog.dart
+   *             ... other core files ...
+   *          coreimpl/
+   *             coreimpl_runtime.dart
+   *             ... other coreimpl files ...
+   *          dom/
+   *             dom.dart
+   *             ... other dom files ...
+   *          ... other library directories ...
+   * </pre>
+   */
+  public abstract File getLibrariesDir();
+
+  /**
    * Answer the original "dart:<libname>" URI for the specified resolved URI or <code>null</code> if
    * it does not map to a short URI.
    */
   public URI getShortUri(URI uri) {
     return longToShortUriMap.get(uri);
   }
 
   /**
    * Scan the directory returned by {@link #getLibrariesDir()} looking for libraries of the form
    * libraries/<name>/<name>_<platform>.dart and libraries/<name>/<name>.dart where <platform> is
@@ skipping 41 matching lines @@
         }
 
         DartCore.logInformation("Expected " + platformLibFileName + " or " + commonLibFileName
             + " in " + dir);
       }
     }
     return libraries.toArray(new SystemLibrary[libraries.size()]);
   }
 
   /**
-   * Answer the directory containing the library folders. Typically this would be the "dart-sdk/lib"
-   * directory.
-   * 
-   * <pre>
-   * install-directory/
-   *    dart-sdk/
-   *       lib/
-   *          core/
-   *             core_runtime.dart
-   *             core_frog.dart
-   *             ... other core files ...
-   *          coreimpl/
-   *             coreimpl_runtime.dart
-   *             ... other coreimpl files ...
-   *          dom/
-   *             dom.dart
-   *             ... other dom files ...
-   *          ... other library directories ...
-   * </pre>
-   */
-  abstract File getLibrariesDir();
-
-  /**
    * Answer the platform name (DartC = "compiler", VM = "runtime") used when locating platform
    * specific library files (e.g. "core_runtime.dart" vs "core.dart").
    */
   abstract String getPlatformName();
 
   private boolean addLib(String host, String name, File dir, String libFileName)
       throws AssertionError {
     File libFile = new File(dir, libFileName);
     if (!libFile.isFile()) {
       return false;
@@ skipping 11 matching lines @@
       expandedUri = new URI("dart://" + host + "/" + libFileName);
     } catch (URISyntaxException e) {
       throw new AssertionError(e);
     }
     URI resolvedUri = lib.translateUri(expandedUri);
     longToShortUriMap.put(resolvedUri, libUri);
     longToShortUriMap.put(expandedUri, libUri);
     return true;
   }
 }