Formatting improvements to the fuzzer harness

Based on review comments in crrev.com/c/1670424.

Bug: 961564
Change-Id: I377242ec7db98aa0ed0dd1e8efcf8a7b18d315be
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1677806Reviewed-by: Timothy Loh <timloh@chromium.org>
Commit-Queue: Nic Hollingum <hollingum@google.com>
Cr-Commit-Position: refs/heads/master@{#672713}

components/exo/wayland/fuzzer/harness.cc.tmpl

@@ -88,10 +88,13 @@ namespace wayland_fuzzer {
         {% endif %}
       {% endfor %}
 
+      {% if request.is_constructor %}
+        struct {{request.constructed}}* new_object =
+      {% endif %}
       // Invoke the wayland method.  We need ::method_name in order to
       // disambiguate methods which might collide with
       // interface/namespace names.
-      {% if request.is_constructor %} struct {{request.constructed}}* new_object = {% endif %}::{{interface.name}}_{{request.name}}(receiver
+      ::{{interface.name}}_{{request.name}}(receiver
         {% for arg in request.args %}
           {% if arg.type == 'object' or arg.type == 'fd' %}
             , {{arg.name}}