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"
 #include "base/metrics/field_trial.h"
 #include "base/time/time.h"
 #include "components/data_reduction_proxy/common/data_reduction_proxy_switches.h"
 #include "net/base/host_port_pair.h"
 #include "net/proxy/proxy_config.h"
 #include "net/proxy/proxy_info.h"
 #include "net/proxy/proxy_retry_info.h"
 #include "net/proxy/proxy_server.h"
 #include "net/proxy/proxy_service.h"
 #include "net/url_request/url_request.h"
 #include "net/url_request/url_request_context.h"
 #include "url/url_constants.h"
 
 using base::FieldTrialList;
 
 namespace {
 const char kEnabled[] = "Enabled";
+const char kForcedEnabled[] = "Forced_Enabled";
 }
 
 namespace data_reduction_proxy {
 
 // static
 bool DataReductionProxyParams::IsIncludedInFieldTrial() {
   return base::FieldTrialList::FindFullName(
       "DataCompressionProxyRollout") == kEnabled;
 }
 
 // static
 bool DataReductionProxyParams::IsIncludedInAlternativeFieldTrial() {
-  return base::FieldTrialList::FindFullName(
-      "DataCompressionProxyAlternativeConfiguration") == kEnabled;
+  return (
+      base::FieldTrialList::FindFullName(
+          "DataCompressionProxyAlternativeConfiguration") == kEnabled ||
+      base::FieldTrialList::FindFullName(
+          "DataCompressionProxyAlternativeConfiguration") == kForcedEnabled);

[Alexei Svitkine (slow), 2014/09/18 17:46:40]

The go/finch-and-flags page actually doesn't say to do it this way as a best
practice. Though it will mostly work, it misses an edge case - which is when the
flag is on but the Finch config is not available. So it's best to check the
flag, but after you query the group from the API - the page has a code snippet
example.

[bengr, 2014/09/18 19:28:33]

Done. I think.

 }
 
 // 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