Fix bugs in parser and update tests to use new directive syntax

compiler/java/com/google/dart/compiler/type/TypeAnalyzer.java

Index: compiler/java/com/google/dart/compiler/type/TypeAnalyzer.java
===================================================================
--- compiler/java/com/google/dart/compiler/type/TypeAnalyzer.java	(revision 10652)
+++ compiler/java/com/google/dart/compiler/type/TypeAnalyzer.java	(working copy)
@@ -2706,12 +2706,14 @@
 
     @Override
     public Type visitImportDirective(DartImportDirective node) {
-      return typeAsVoid(node);
+      //return typeAsVoid(node);
+      return voidType;
     }
 
     @Override
     public Type visitLibraryDirective(DartLibraryDirective node) {
-      return typeAsVoid(node);
+      //return typeAsVoid(node);
+      return voidType;
     }
 
     @Override