Update GitilesServlet constructor parameters.

To follow the Gitiles change I3e12e624, this CL adds a null
for blameCache.

Change-Id: I73436ffa94b6682bdb998d38a612697df8ae86e2
diff --git a/src/main/java/com/googlesource/gerrit/plugins/gitiles/HttpModule.java b/src/main/java/com/googlesource/gerrit/plugins/gitiles/HttpModule.java
index 2d3f448..a5d7023 100644
--- a/src/main/java/com/googlesource/gerrit/plugins/gitiles/HttpModule.java
+++ b/src/main/java/com/googlesource/gerrit/plugins/gitiles/HttpModule.java
@@ -55,7 +55,7 @@
       GitilesAccess.Factory accessFactory,
       RepositoryResolver<HttpServletRequest> resolver,
       MenuFilter menuFilter) throws ServletException {
-    GitilesServlet s = new GitilesServlet(cfg, null, urls, accessFactory, resolver, null, null, null);
+    GitilesServlet s = new GitilesServlet(cfg, null, urls, accessFactory, resolver, null, null, null, null);
     for (GitilesView.Type view : GitilesView.Type.values()) {
       s.addFilter(view, menuFilter);
     }