Create html if needed in server mode

lib/src/checker/resolver.dart

Index: lib/src/checker/resolver.dart
diff --git a/lib/src/checker/resolver.dart b/lib/src/checker/resolver.dart
index 5275105e8bc2c355efc784f63bd31ffe093779dd..18f326a0af38c001a494d3b2b49e414a751ca6f3 100644
--- a/lib/src/checker/resolver.dart
+++ b/lib/src/checker/resolver.dart
@@ -37,9 +37,10 @@ class TypeResolver {
   final Map<Uri, Source> _sources = <Uri, Source>{};
 
   TypeResolver(DartUriResolver sdkResolver, ResolverOptions options,
-      {List otherResolvers})
+      {UriResolver entryResolver, List otherResolvers})
       : context = _initContext(options) {
-    var resolvers = [sdkResolver];
+    var resolvers =
+        entryResolver == null ? [sdkResolver] : [entryResolver, sdkResolver];
     if (otherResolvers == null) {
       resolvers.add(new FileUriResolver());
       resolvers.add(options.useMultiPackage
@@ -54,17 +55,18 @@ class TypeResolver {
   /// Creates a [TypeResolver] that uses a mock 'dart:' library contents.
   TypeResolver.fromMock(
       Map<String, String> mockSources, ResolverOptions options,
-      {List otherResolvers})
+      {UriResolver entryResolver, List otherResolvers})
       : this(
           new MockDartSdk(mockSources, reportMissing: true).resolver, options,
-          otherResolvers: otherResolvers);
+          entryResolver: entryResolver, otherResolvers: otherResolvers);
 
   /// Creates a [TypeResolver] that uses the SDK at the given [sdkPath].
   TypeResolver.fromDir(String sdkPath, ResolverOptions options,
-      {List otherResolvers})
+      {UriResolver entryResolver, List otherResolvers})
       : this(
           new DartUriResolver(new DirectoryBasedDartSdk(new JavaFile(sdkPath))),
-          options, otherResolvers: otherResolvers);
+          options,
+          entryResolver: entryResolver, otherResolvers: otherResolvers);
 
   /// Find the corresponding [Source] for [uri].
   Source findSource(Uri uri) {