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
new file mode 100644
index 0000000000000000000000000000000000000000..9458d828c406315d1d436d9fb7d9691185fb1a39
--- /dev/null
+++ b/components/data_reduction_proxy/content/browser/content_data_reduction_proxy_lofi_helper.cc
@@ -0,0 +1,32 @@
+// Copyright 2015 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "components/data_reduction_proxy/content/browser/content_data_reduction_proxy_lofi_helper.h"
+
+#include "components/data_reduction_proxy/core/common/data_reduction_proxy_params.h"
+#include "content/public/browser/resource_request_info.h"
+#include "net/url_request/url_request.h"
+
+namespace data_reduction_proxy {
+
+ContentDataReductionProxyLoFiHelper::ContentDataReductionProxyLoFiHelper() {}
+
+ContentDataReductionProxyLoFiHelper::~ContentDataReductionProxyLoFiHelper() {}
+
+bool ContentDataReductionProxyLoFiHelper::ShouldUseLoFi(
+    const net::URLRequest* request) const {
+  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;
+}
+
+}  // namespace data_reduction_roxy