Consistently use LoFi for an entire page

components/data_reduction_proxy/content/browser/content_data_reduction_proxy_lofi_helper.cc

Index: components/data_reduction_proxy/content/browser/content_data_reduction_proxy_lofi_helper.cc
diff --git a/components/data_reduction_proxy/content/browser/content_data_reduction_proxy_lofi_helper.cc b/components/data_reduction_proxy/content/browser/content_data_reduction_proxy_lofi_helper.cc
index 1afd5f9ddf1ee9b8cc31899c9ad15d9d09a3d85f..9458d828c406315d1d436d9fb7d9691185fb1a39 100644
--- a/components/data_reduction_proxy/content/browser/content_data_reduction_proxy_lofi_helper.cc
+++ b/components/data_reduction_proxy/content/browser/content_data_reduction_proxy_lofi_helper.cc
@@ -16,12 +16,16 @@ ContentDataReductionProxyLoFiHelper::~ContentDataReductionProxyLoFiHelper() {}
 
 bool ContentDataReductionProxyLoFiHelper::ShouldUseLoFi(
     const net::URLRequest* request) const {
-  //  TODO: will be check of IsLoFi ResourceRequestInfo &&
-  //  (params::IsLoFiOnViaFlags() ||
-  //  params::IsIncludedInLoFiEnabledFieldTrial())
-  // The Lo-Fi directive should not be added for users in the Lo-Fi field
-  // trial "Control" group. Check that the user is in a group that should
-  // get "q=low".
+  const content::ResourceRequestInfo* request_info =
+      content::ResourceRequestInfo::ForRequest(request);
+  if (request_info) {
+    // The Lo-Fi directive should not be added for users in the Lo-Fi field
+    // trial "Control" group unless he or she turns on Lo-Fi through a flag.
+    // Check that the user is in a group that should get "q=low".
+    return request_info->IsUsingLoFi() &&
+           (params::IsLoFiOnViaFlags() ||
+            params::IsIncludedInLoFiEnabledFieldTrial());
+  }
   return false;
 }