Support for new 'export' directive in resolver

compiler/java/com/google/dart/compiler/ast/LibraryExport.java

Index: compiler/java/com/google/dart/compiler/ast/LibraryExport.java
diff --git a/compiler/java/com/google/dart/compiler/ast/LibraryImport.java b/compiler/java/com/google/dart/compiler/ast/LibraryExport.java
similarity index 72%
copy from compiler/java/com/google/dart/compiler/ast/LibraryImport.java
copy to compiler/java/com/google/dart/compiler/ast/LibraryExport.java
index e6f32f557768403c2c508d200b7b0ed18bd334b3..ef1d6893b481752bb13cf8323ebc04f295ec8aac 100644
--- a/compiler/java/com/google/dart/compiler/ast/LibraryImport.java
+++ b/compiler/java/com/google/dart/compiler/ast/LibraryExport.java
@@ -11,36 +11,30 @@ import java.util.List;
 import java.util.Set;
 
 /**
- * Information about import - prefix and {@link LibraryUnit}.
+ * Information about export - {@link LibraryUnit} and show/hide names.
  */
-public class LibraryImport {
+public class LibraryExport {
   private final LibraryUnit library;
-  private final String prefix;
   private final Set<String> showNames;
   private final Set<String> hideNames;
-  private final boolean exported;
 
-  public LibraryImport(LibraryUnit library, String prefix, List<ImportCombinator> combinators,
-      boolean exported) {
+  public LibraryExport(LibraryUnit library, List<ImportCombinator> combinators) {
     this.library = library;
-    this.prefix = prefix;
     this.showNames = createCombinatorsSet(combinators, true);
     this.hideNames = createCombinatorsSet(combinators, false);
-    this.exported = exported;
   }
 
   @Override
   public int hashCode() {
-    return Objects.hashCode(prefix, library);
+    return Objects.hashCode(library);
   }
 
   @Override
   public boolean equals(Object obj) {
-    if (obj instanceof LibraryImport) {
-      LibraryImport other = (LibraryImport) obj;
-      return Objects.equal(library, other.library) && Objects.equal(prefix, other.prefix)
-          && Objects.equal(showNames, other.showNames) && Objects.equal(hideNames, other.hideNames)
-          && exported == other.exported;
+    if (obj instanceof LibraryExport) {
+      LibraryExport other = (LibraryExport) obj;
+      return Objects.equal(library, other.library) && Objects.equal(showNames, other.showNames)
+          && Objects.equal(hideNames, other.hideNames);
     }
     return false;
   }
@@ -49,10 +43,6 @@ public class LibraryImport {
     return library;
   }
 
-  public String getPrefix() {
-    return prefix;
-  }
-  
   public boolean isVisible(String name) {
     if (hideNames.contains(name)) {
       return false;
@@ -63,10 +53,6 @@ public class LibraryImport {
     return true;
   }
 
-  public boolean isExported() {
-    return exported;
-  }
-
   private static Set<String> createCombinatorsSet(List<ImportCombinator> combinators, boolean show) {
     Set<String> result = Sets.newHashSet();
     for (ImportCombinator combinator : combinators) {