[content shell] add support for a testRunner.setXSSAuditorEnabled

content/renderer/render_view_impl.cc

Index: content/renderer/render_view_impl.cc
diff --git a/content/renderer/render_view_impl.cc b/content/renderer/render_view_impl.cc
index 5f1411ceaf91025f28c64ab79deb37ce2a4ef7f8..b7e108cc802b272a6defedcfe5eb7275ef5e6f43 100644
--- a/content/renderer/render_view_impl.cc
+++ b/content/renderer/render_view_impl.cc
@@ -4312,6 +4312,10 @@ WebPreferences& RenderViewImpl::GetWebkitPreferences() {
   return webkit_preferences_;
 }
 
+void RenderViewImpl::SetWebkitPreferences(const WebPreferences& preferences) {
+  OnUpdateWebPreferences(preferences);
+}
+
 WebKit::WebView* RenderViewImpl::GetWebView() {
   return webview();
 }