Removed requirement that data reduction proxy key be non-empty

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 "base/command_line.h"
 #include "base/metrics/field_trial.h"
 #include "components/data_reduction_proxy/common/data_reduction_proxy_switches.h"
 #include "net/url_request/url_request.h"
@@ skipping 119 matching lines @@
           << alt_fallback_origin_.spec();
       return false;
     }
   }
 
   if (allowed && !probe_url_.is_valid()) {
     DVLOG(1) << "Invalid probe url: <null>";
     return false;
   }
 
-  if (allowed || alt_allowed) {
-    if (key_.empty()) {
-      DVLOG(1) << "Invalid key: <empty>";
-      return false;
-    }
-  }
-
   if (fallback_allowed_ && !allowed_) {
     DVLOG(1) << "The data reduction proxy fallback cannot be allowed if "
         << "the data reduction proxy is not allowed";
     return false;
   }
   if (promo_allowed_ && !allowed_) {
     DVLOG(1) << "The data reduction proxy promo cannot be allowed if the "
         << "data reduction proxy is not allowed";
     return false;
   }
@@ skipping 179 matching lines @@
 }
 
 std::string DataReductionProxyParams::GetDefaultProbeURL() const {
 #if defined(DATA_REDUCTION_PROXY_PROBE_URL)
   return DATA_REDUCTION_PROXY_PROBE_URL;
 #endif
   return std::string();
 }
 
 }  // namespace data_reduction_proxy