Add probe to warm data reduction proxy

components/data_reduction_proxy/browser/data_reduction_proxy_params.cc

Index: components/data_reduction_proxy/browser/data_reduction_proxy_params.cc
diff --git a/components/data_reduction_proxy/browser/data_reduction_proxy_params.cc b/components/data_reduction_proxy/browser/data_reduction_proxy_params.cc
index 16e0d20c6033e603005177f549a7b3a2c58a1cc4..d3a38903d5739f8e4695bfed4a11d3003fd3e191 100644
--- a/components/data_reduction_proxy/browser/data_reduction_proxy_params.cc
+++ b/components/data_reduction_proxy/browser/data_reduction_proxy_params.cc
@@ -199,6 +199,8 @@ void DataReductionProxyParams::InitWithoutChecks() {
 
   std::string probe_url = command_line.GetSwitchValueASCII(
       switches::kDataReductionProxyProbeURL);
+  std::string warmup_url = command_line.GetSwitchValueASCII(
+      switches::kDataReductionProxyWarmupURL);
 
   // Set from preprocessor constants those params that are not specified on the
   // command line.
@@ -216,6 +218,8 @@ void DataReductionProxyParams::InitWithoutChecks() {
     alt_fallback_origin = GetDefaultAltFallbackOrigin();
   if (probe_url.empty())
     probe_url = GetDefaultProbeURL();
+  if (warmup_url.empty())
+    warmup_url = GetDefaultWarmupURL();
 
   origin_ = GURL(origin);
   fallback_origin_ = GURL(fallback_origin);
@@ -223,6 +227,7 @@ void DataReductionProxyParams::InitWithoutChecks() {
   alt_origin_ = GURL(alt_origin);
   alt_fallback_origin_ = GURL(alt_fallback_origin);
   probe_url_ = GURL(probe_url);
+  warmup_url_ = GURL(warmup_url);
 
 }
 
@@ -342,4 +347,11 @@ std::string DataReductionProxyParams::GetDefaultProbeURL() const {
   return std::string();
 }
 
+std::string DataReductionProxyParams::GetDefaultWarmupURL() const {
+#if defined(DATA_REDUCTION_PROXY_WARMUP_URL)
+  return DATA_REDUCTION_PROXY_WARMUP_URL;
+#endif
+  return std::string();
+}
+
 }  // namespace data_reduction_proxy