Fixes for parsing warnigs, issue 1060.

compiler/java/com/google/dart/compiler/resolver/Elements.java

Index: compiler/java/com/google/dart/compiler/resolver/Elements.java
diff --git a/compiler/java/com/google/dart/compiler/resolver/Elements.java b/compiler/java/com/google/dart/compiler/resolver/Elements.java
index d5c854f0396dd965e59da3c9897999d33ffcbcd0..3561852ad315fe6a4f844f41c51e9be5345f3320 100644
--- a/compiler/java/com/google/dart/compiler/resolver/Elements.java
+++ b/compiler/java/com/google/dart/compiler/resolver/Elements.java
@@ -7,6 +7,8 @@ package com.google.dart.compiler.resolver;
 import com.google.common.annotations.VisibleForTesting;
 import com.google.common.base.Objects;
 import com.google.common.collect.Lists;
+import com.google.dart.compiler.DartSource;
+import com.google.dart.compiler.LibrarySource;
 import com.google.dart.compiler.Source;
 import com.google.dart.compiler.ast.DartClass;
 import com.google.dart.compiler.ast.DartClassMember;
@@ -536,4 +538,19 @@ static FieldElementImplementation fieldFromNode(DartField node,
     }
     return null;
   }
+
+  /**
+   * @return <code>true</code> if given {@link Source} represents library with given name.
+   */
+  public static boolean isLibrarySource(Source source, String name) {
+    if (source instanceof DartSource) {
+      DartSource dartSource = (DartSource) source;
+      LibrarySource library = dartSource.getLibrary();
+      if (library != null) {
+        String libraryName = library.getName();
+        return libraryName.startsWith("dart://") && libraryName.endsWith("/" + name);
+      }
+    }
+    return false;
+  }
 }