Added VMLibraryHooks setup for Dartium to support resolvePackageUri.

tools/dom/scripts/generate_blink_file.py

Index: tools/dom/scripts/generate_blink_file.py
diff --git a/tools/dom/scripts/generate_blink_file.py b/tools/dom/scripts/generate_blink_file.py
index dee266cf28481b1a51108c1b8026060f3dec25b7..85393a52ae5bc07cf3668c803cffedf086f8bfe8 100644
--- a/tools/dom/scripts/generate_blink_file.py
+++ b/tools/dom/scripts/generate_blink_file.py
@@ -98,6 +98,7 @@ library dart.dom._blink;
 
 import 'dart:js' as js;
 import 'dart:html' show DomException;
+import 'dart:_internal' as internal;
 // This is a place to put custom renames if we need them.
 final resolverMap = {
 };
@@ -127,6 +128,12 @@ class Blink_Utils {
 
   static register(document, tag, customType, extendsTagName) native "Utils_register";
 
+  // Below code sets up VMLibraryHooks for resolvePackageUri.
+  static Uri resolvePackageUri(Uri packageUri) native "Utils_resolvePackageUri";
+  static void _setupHooks() {
+    internal.VMLibraryHooks.resolvePackageUriFuture = resolvePackageUri;
+  }
+
   // Defines an interceptor if there is an appropriate JavaScript prototype to define it on.
   // In any case, returns a typed JS wrapper compatibile with dart:html and the new
   // typed JS Interop.