Issue 8365. Report error when user library imports an internal SDK library.

editor/tools/plugins/com.google.dart.engine/src/com/google/dart/engine/internal/element/ImportElementImpl.java

Index: editor/tools/plugins/com.google.dart.engine/src/com/google/dart/engine/internal/element/ImportElementImpl.java
diff --git a/editor/tools/plugins/com.google.dart.engine/src/com/google/dart/engine/internal/element/ImportElementImpl.java b/editor/tools/plugins/com.google.dart.engine/src/com/google/dart/engine/internal/element/ImportElementImpl.java
index b7a3573f4d09474646fc5d20b34a05c876d9cc83..8f458a7e63cb32b09c784e6155c746a67fd4b39b 100644
--- a/editor/tools/plugins/com.google.dart.engine/src/com/google/dart/engine/internal/element/ImportElementImpl.java
+++ b/editor/tools/plugins/com.google.dart.engine/src/com/google/dart/engine/internal/element/ImportElementImpl.java
@@ -27,6 +27,11 @@ import com.google.dart.engine.element.PrefixElement;
  */
 public class ImportElementImpl extends ElementImpl implements ImportElement {
   /**
+   * The URI that was is specified by this import directive.
+   */
+  private String uri;
+
+  /**
    * The library that is imported into this library by this import directive.
    */
   private LibraryElement importedLibrary;
@@ -75,6 +80,11 @@ public class ImportElementImpl extends ElementImpl implements ImportElement {
     return prefix;
   }
 
+  @Override
+  public String getUri() {
+    return uri;
+  }
+
   /**
    * Set the combinators that were specified as part of the import directive to the given array of
    * combinators.
@@ -104,6 +114,15 @@ public class ImportElementImpl extends ElementImpl implements ImportElement {
     this.prefix = prefix;
   }
 
+  /**
+   * Set the URI that was is specified by this import directive.
+   * 
+   * @param uri the URI that was is specified by this import directive.
+   */
+  public void setUri(String uri) {
+    this.uri = uri;
+  }
+
   @Override
   public void visitChildren(ElementVisitor<?> visitor) {
     super.visitChildren(visitor);