Dev finch trial of the data reduction proxy overrides both the primary and the fallback hosts

components/data_reduction_proxy/browser/data_reduction_proxy_params.cc

 // Copyright 2014 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/browser/data_reduction_proxy_params.h"
 
 #include <vector>
 
 #include "base/command_line.h"
 #include "base/memory/scoped_ptr.h"
@@ skipping 235 matching lines @@
   std::string warmup_url = command_line.GetSwitchValueASCII(
       switches::kDataReductionProxyWarmupURL);
 
   // Set from preprocessor constants those params that are not specified on the
   // command line.
   if (origin.empty())
     origin = GetDefaultDevOrigin();
   if (origin.empty())
     origin = GetDefaultOrigin();
   if (fallback_origin.empty())
+    fallback_origin = GetDefaultDevFallbackOrigin();
+  if (fallback_origin.empty())
     fallback_origin = GetDefaultFallbackOrigin();
   if (ssl_origin.empty())
     ssl_origin = GetDefaultSSLOrigin();
   if (alt_origin.empty())
     alt_origin = GetDefaultAltOrigin();
   if (alt_fallback_origin.empty())
     alt_fallback_origin = GetDefaultAltFallbackOrigin();
   if (probe_url.empty())
     probe_url = GetDefaultProbeURL();
   if (warmup_url.empty())
@@ skipping 123 matching lines @@
     return std::string();
   if (command_line.HasSwitch(switches::kEnableDataReductionProxyDev) ||
       (FieldTrialList::FindFullName("DataCompressionProxyDevRollout") ==
          kEnabled)) {
     return DATA_REDUCTION_DEV_HOST;
   }
 #endif
   return std::string();
 }
 
+std::string DataReductionProxyParams::GetDefaultDevFallbackOrigin() const {
+#if defined(DATA_REDUCTION_DEV_FALLBACK_HOST)
+  const CommandLine& command_line = *CommandLine::ForCurrentProcess();
+  if (command_line.HasSwitch(switches::kDisableDataReductionProxyDev))
+    return std::string();
+  if (command_line.HasSwitch(switches::kEnableDataReductionProxyDev) ||
+      (FieldTrialList::FindFullName("DataCompressionProxyDevRollout") ==
+           kEnabled)) {
+    return DATA_REDUCTION_DEV_FALLBACK_HOST;
+  }
+#endif
+  return std::string();
+}
+
 bool DataReductionProxyParams::AreDataReductionProxiesBypassed(
     const net::URLRequest& request, base::TimeDelta* min_retry_delay) const {
   if (request.context() != NULL &&
       request.context()->proxy_service() != NULL) {
     return AreProxiesBypassed(
         request.context()->proxy_service()->proxy_retry_info(),
         request.url().SchemeIs(url::kHttpsScheme),
         min_retry_delay);
   }
 
@@ skipping 115 matching lines @@
 }
 
 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