html escape log messages

pkg/polymer/test/build/import_inliner_test.dart

Index: pkg/polymer/test/build/import_inliner_test.dart
diff --git a/pkg/polymer/test/build/import_inliner_test.dart b/pkg/polymer/test/build/import_inliner_test.dart
index edbaa0ea6f3a50e2f6f5280a442b03eb1e2d25ab..c25958a4b2c2483208a3d72a0b7f721081239866 100644
--- a/pkg/polymer/test/build/import_inliner_test.dart
+++ b/pkg/polymer/test/build/import_inliner_test.dart
@@ -682,12 +682,13 @@ void importTests() {
         'a|web/test.html._buildLogs.1':
           '[{'
             '"level":"Error",'
-            '"message":"Failed to inline html import: '
-              'Could not find asset a|web/foo.html.",'
+            '"message":"${const HtmlEscape().convert(
+                'Failed to inline html import: '
+                'Could not find asset a|web/foo.html.')}",'
             '"assetId":{"package":"a","path":"web/foo.html"},'
             '"span":{'
               '"location":"web/test.html:1:28",'
-              '"text":"${new HtmlEscape().convert(
+              '"text":"${const HtmlEscape().convert(
                 '<link rel="import" href="foo.html">')}"'
               '}'
             '}]',
@@ -1103,4 +1104,4 @@ void entryPointTests() {
         '<script rel="import" href="../../packages/b/bar/bar.js"></script>'
         '</body></html>',
   });
-}
+}