Use the Previews Black List for server previews

components/data_reduction_proxy/core/browser/data_reduction_proxy_io_data.h

Index: components/data_reduction_proxy/core/browser/data_reduction_proxy_io_data.h
diff --git a/components/data_reduction_proxy/core/browser/data_reduction_proxy_io_data.h b/components/data_reduction_proxy/core/browser/data_reduction_proxy_io_data.h
index 22a90a8397ef904afa505e90fc2191e04653bade..a763177b7e11c8a982a66107d3c2be47bb37babe 100644
--- a/components/data_reduction_proxy/core/browser/data_reduction_proxy_io_data.h
+++ b/components/data_reduction_proxy/core/browser/data_reduction_proxy_io_data.h
@@ -36,6 +36,10 @@ class URLRequestContextGetter;
 class URLRequestInterceptor;
 }
 
+namespace previews {
+class PreviewsDecider;
+}
+
 namespace data_reduction_proxy {
 
 class DataReductionProxyBypassStats;
@@ -98,12 +102,18 @@ class DataReductionProxyIOData : public DataReductionProxyEventStorageDelegate {
   // Returns true when Lo-Fi Previews should be activated. When Lo-Fi is
   // active, URL requests are modified to request low fidelity versions of the
   // resources, except when the user is in the Lo-Fi control group.
-  bool ShouldEnableLoFi(const net::URLRequest& request);
+  // |previews_decider| is a non-null object that determines eligibility of
+  // showing the preview based on past opt outs.
+  bool ShouldEnableLoFi(const net::URLRequest& request,
+                        previews::PreviewsDecider* previews_decider);
 
   // Returns true when Lite Page Previews should be activated. When Lite Pages
   // are active, a low fidelity transcoded page is requested on the main frame
-  // resource, except when the user is in the control group.
-  bool ShouldEnableLitePages(const net::URLRequest& request);
+  // resource, except when the user is in the control group. |previews_decider|
+  // is a non-null object that determines eligibility of showing the preview
+  // based on past opt outs.
+  bool ShouldEnableLitePages(const net::URLRequest& request,
+                             previews::PreviewsDecider* previews_decider);
 
   // Sets Lo-Fi mode off in |config_|.
   void SetLoFiModeOff();