Adding DRP specfic UMA for FirstContentfulPaint

components/data_reduction_proxy/core/browser/data_reduction_proxy_data.cc

Index: components/data_reduction_proxy/core/browser/data_reduction_proxy_data.cc
diff --git a/components/data_reduction_proxy/core/browser/data_reduction_proxy_data.cc b/components/data_reduction_proxy/core/browser/data_reduction_proxy_data.cc
new file mode 100644
index 0000000000000000000000000000000000000000..4290b2e16cc03de6286c60706edf0b8c99ea1b83
--- /dev/null
+++ b/components/data_reduction_proxy/core/browser/data_reduction_proxy_data.cc
@@ -0,0 +1,44 @@
+// Copyright 2016 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/core/browser/data_reduction_proxy_data.h"
+
+#include "net/url_request/url_request.h"
+
+namespace data_reduction_proxy {
+
+const void* const kDataReductionProxyUserDataKey =
+    &kDataReductionProxyUserDataKey;
+
+DataReductionProxyData::DataReductionProxyData()
+    : used_data_reduction_proxy_(false), lofi_requested_(false) {}
+
+std::unique_ptr<DataReductionProxyData> DataReductionProxyData::DeepCopy()
+    const {
+  std::unique_ptr<DataReductionProxyData> copy(new DataReductionProxyData());
+  copy->used_data_reduction_proxy_ = used_data_reduction_proxy_;
+  copy->lofi_requested_ = lofi_requested_;
+  return copy;
+}
+
+DataReductionProxyData* DataReductionProxyData::GetData(
+    const net::URLRequest& request) {
+  DataReductionProxyData* data = static_cast<DataReductionProxyData*>(
+      request.GetUserData(kDataReductionProxyUserDataKey));
+  return data;
+}
+
+DataReductionProxyData* DataReductionProxyData::GetDataAndCreateIfNecessary(
+    net::URLRequest* request) {
+  if (!request)
+    return nullptr;
+  DataReductionProxyData* data = GetData(*request);
+  if (data)
+    return data;
+  data = new DataReductionProxyData();
+  request->SetUserData(kDataReductionProxyUserDataKey, data);
+  return data;
+}
+
+}  // namespace data_reduction_proxy