Ignore MISSING_VIA_HEADER_OTHER bypasses if in relevant finch trial

components/data_reduction_proxy/browser/data_reduction_proxy_protocol.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_protocol.h"
 
 #include "base/memory/ref_counted.h"
 #include "base/time/time.h"
 #include "components/data_reduction_proxy/browser/data_reduction_proxy_params.h"
 #include "components/data_reduction_proxy/browser/data_reduction_proxy_tamper_detection.h"
@@ skipping 55 matching lines @@
     return false;
 
   DataReductionProxyTamperDetection::DetectAndReport(
       original_response_headers,
       data_reduction_proxy_type_info.proxy_servers.first.SchemeIsSecure());
 
   DataReductionProxyInfo data_reduction_proxy_info;
   DataReductionProxyBypassType bypass_type =
       GetDataReductionProxyBypassType(original_response_headers,
                                       &data_reduction_proxy_info);
+
+  if (bypass_type == BYPASS_EVENT_TYPE_MISSING_VIA_HEADER_OTHER &&
+      DataReductionProxyParams::
+          IsIncludedInRemoveMissingViaHeaderOtherBypassFieldTrial()) {
+    // Ignore MISSING_VIA_HEADER_OTHER proxy bypass events if the client is part
+    // of the field trial to remove these kinds of bypasses.
+    bypass_type = BYPASS_EVENT_TYPE_MAX;
+  }
+
   if (proxy_bypass_type)
     *proxy_bypass_type = bypass_type;
   if (bypass_type == BYPASS_EVENT_TYPE_MAX)
     return false;
 
   DCHECK(request->context());
   DCHECK(request->context()->proxy_service());
   net::ProxyServer proxy_server;
   SetProxyServerFromGURL(
       data_reduction_proxy_type_info.proxy_servers.first, &proxy_server);
@@ skipping 111 matching lines @@
   net::ProxyService* proxy_service = request->context()->proxy_service();
   DCHECK(proxy_service);
 
   proxy_service->MarkProxiesAsBadUntil(proxy_info,
                                        bypass_duration,
                                        fallback,
                                        request->net_log());
 }
 
 }  // namespace data_reduction_proxy