Added flag to enable the data reduction proxy alternative

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 19 matching lines @@
 namespace data_reduction_proxy {
 
 // static
 bool DataReductionProxyParams::IsIncludedInFieldTrial() {
   return base::FieldTrialList::FindFullName(
       "DataCompressionProxyRollout") == kEnabled;
 }
 
 // static
 bool DataReductionProxyParams::IsIncludedInAlternativeFieldTrial() {
-  return base::FieldTrialList::FindFullName(
-      "DataCompressionProxyAlternativeConfiguration") == kEnabled;
+  const CommandLine& command_line = *CommandLine::ForCurrentProcess();
+  return (command_line.HasSwitch(
+              data_reduction_proxy::switches::kEnableDataReductionProxyAlt) ||
+          base::FieldTrialList::FindFullName(
+              "DataCompressionProxyAlternativeConfiguration") == kEnabled);

[Alexei Svitkine (slow), 2014/09/17 20:15:07]

Use the pattern recommended by go/finch-and-flags instead, which allows you to
be able to distinguish users who have the flag on the dashboard (vs. this way,
where they wouldn't touch the trial and thus wouldn't be tagged).

[bengr, 2014/09/18 17:39:46]

Done.

 }
 
 // static
 bool DataReductionProxyParams::IsIncludedInPromoFieldTrial() {
   return FieldTrialList::FindFullName(
       "DataCompressionProxyPromoVisibility") == kEnabled;
 }
 
 // static
 bool DataReductionProxyParams::IsIncludedInPreconnectHintingFieldTrial() {
@@ skipping 488 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