Use the Previews Black List for server previews

chrome/browser/loader/chrome_resource_dispatcher_host_delegate.cc

Index: chrome/browser/loader/chrome_resource_dispatcher_host_delegate.cc
diff --git a/chrome/browser/loader/chrome_resource_dispatcher_host_delegate.cc b/chrome/browser/loader/chrome_resource_dispatcher_host_delegate.cc
index 0a2881c3935ddbf8f5c5a81cb02c0d8df8bbb334..da8eb0261f53f150bd236390666a45b90ba7ee98 100644
--- a/chrome/browser/loader/chrome_resource_dispatcher_host_delegate.cc
+++ b/chrome/browser/loader/chrome_resource_dispatcher_host_delegate.cc
@@ -891,18 +891,20 @@ content::PreviewsState ChromeResourceDispatcherHostDelegate::GetPreviewsState(
 
   content::PreviewsState previews_state = content::PREVIEWS_UNSPECIFIED;
 
-  if (data_reduction_proxy_io_data) {
-    if (data_reduction_proxy_io_data->ShouldEnableLoFi(url_request))
+  previews::PreviewsIOData* previews_io_data = io_data->previews_io_data();
+  if (data_reduction_proxy_io_data && previews_io_data) {
+    if (data_reduction_proxy_io_data->ShouldEnableLoFi(url_request,
+                                                       previews_io_data))
       previews_state |= content::SERVER_LOFI_ON;

[mmenke, 2017/05/10 22:32:47]

nit:  Add braces

[RyanSturm, 2017/05/10 22:35:43]

Done.

-    if (data_reduction_proxy_io_data->ShouldEnableLitePages(url_request))
+    if (data_reduction_proxy_io_data->ShouldEnableLitePages(url_request,
+                                                            previews_io_data))
       previews_state |= content::SERVER_LITE_PAGE_ON;

[mmenke, 2017/05/10 22:32:47]

+braces

[RyanSturm, 2017/05/10 22:35:43]

Done.

 
-    previews::PreviewsIOData* previews_io_data = io_data->previews_io_data();
     // Check that data saver is enabled, the user isn't opted out of LoFi for
     // the session, and the user is eligible for previews.
     if (data_reduction_proxy_io_data->IsEnabled() &&
         !data_reduction_proxy_io_data->config()->lofi_off() &&
-        previews_io_data && previews::params::IsClientLoFiEnabled() &&
+        previews::params::IsClientLoFiEnabled() &&
         previews_io_data->ShouldAllowPreviewAtECT(
             url_request, previews::PreviewsType::LOFI,
             previews::params::