Use gss for UiBinder tests.

Fixes the open source build.

Change-Id: I78a3ea026759a07a830de30fbf13cac7726f8c33
diff --git a/user/test/com/google/gwt/uibinder/test/LazyWidgetBuilderSuite.gwt.xml b/user/test/com/google/gwt/uibinder/test/LazyWidgetBuilderSuite.gwt.xml
index 08d6ce9..8d3d140 100644
--- a/user/test/com/google/gwt/uibinder/test/LazyWidgetBuilderSuite.gwt.xml
+++ b/user/test/com/google/gwt/uibinder/test/LazyWidgetBuilderSuite.gwt.xml
@@ -16,4 +16,7 @@
   <inherits name="com.google.gwt.user.User" />
   <inherits name="com.google.gwt.debug.Debug"/>
   <set-configuration-property name="UiBinder.useLazyWidgetBuilders" value="true"/>
+  <set-configuration-property name="CssResource.enableGss" value="true" />
+  <set-configuration-property name="CssResource.conversionMode" value="strict" />
+  <set-configuration-property name="CssResource.gssInUiBinder" value="true" />
 </module>
diff --git a/user/test/com/google/gwt/uibinder/test/UiBinderSuite.gwt.xml b/user/test/com/google/gwt/uibinder/test/UiBinderSuite.gwt.xml
index f658571..f5ea213 100644
--- a/user/test/com/google/gwt/uibinder/test/UiBinderSuite.gwt.xml
+++ b/user/test/com/google/gwt/uibinder/test/UiBinderSuite.gwt.xml
@@ -15,4 +15,7 @@
 <module>
   <inherits name="com.google.gwt.user.User" />
   <inherits name="com.google.gwt.debug.Debug"/>
+  <set-configuration-property name="CssResource.enableGss" value="true" />
+  <set-configuration-property name="CssResource.conversionMode" value="strict" />
+  <set-configuration-property name="CssResource.gssInUiBinder" value="true" />
 </module>