Create a Lite Page bit for previews and fallback to Lo-Fi

components/data_reduction_proxy/core/common/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/core/common/data_reduction_proxy_params.h"
 
 #include <map>
 #include <string>
 #include <vector>
 
@@ skipping 23 matching lines @@
     "http://o-o.preferred.nttdocomodcp-hnd1.proxy-dev.googlezip.net:80";
 const char kDefaultFallbackOrigin[] = "compress.googlezip.net:80";
 const char kDefaultSecureProxyCheckUrl[] = "http://check.googlezip.net/connect";
 const char kDefaultWarmupUrl[] = "http://check.googlezip.net/generate_204";
 
 const char kAndroidOneIdentifier[] = "sprout";
 
 const char kQuicFieldTrial[] = "DataReductionProxyUseQuic";
 
 const char kLoFiFieldTrial[] = "DataCompressionProxyLoFi";
+const char kLitePageFallbackFieldTrial[] =
+    "DataCompressionProxyLitePageFallback";
 const char kLoFiFlagFieldTrial[] = "DataCompressionProxyLoFiFlag";
 
 const char kTrustedSpdyProxyFieldTrialName[] = "DataReductionTrustedSpdyProxy";
 
 // Default URL for retrieving the Data Reduction Proxy configuration.
 const char kClientConfigURL[] =
     "https://datasaver.googleapis.com/v1/clientConfigs";
 
 // Default URL for sending pageload metrics.
 const char kPingbackURL[] =
@@ skipping 43 matching lines @@
 }
 
 bool IsIncludedInTrustedSpdyProxyFieldTrial() {
   return IsIncludedInFieldTrial(GetTrustedSpdyProxyFieldTrialName());
 }
 
 const char* GetLoFiFieldTrialName() {
   return kLoFiFieldTrial;
 }
 
+const char* GetLitePageFallbackFieldTrialName() {
+  return kLitePageFallbackFieldTrial;
+}
+
 const char* GetLoFiFlagFieldTrialName() {
   return kLoFiFlagFieldTrial;
 }
 
 bool IsIncludedInLoFiEnabledFieldTrial() {
   return !IsLoFiOnViaFlags() && !IsLoFiDisabledViaFlags() &&
          IsIncludedInFieldTrial(GetLoFiFieldTrialName());
 }
 
 bool IsIncludedInLoFiControlFieldTrial() {
   return !IsLoFiOnViaFlags() && !IsLoFiDisabledViaFlags() &&
          base::StartsWith(FieldTrialList::FindFullName(GetLoFiFieldTrialName()),
                           kControl, base::CompareCase::SENSITIVE);
 }
 
 bool IsIncludedInLitePageFieldTrial() {
   return !IsLoFiOnViaFlags() && !IsLoFiDisabledViaFlags() &&
          base::StartsWith(FieldTrialList::FindFullName(GetLoFiFieldTrialName()),
                           kLitePage, base::CompareCase::SENSITIVE);
 }
 
+bool IsLitePageFallbackEnabled() {
+  return IsIncludedInFieldTrial(GetLitePageFallbackFieldTrialName()) ||
+         (IsLoFiOnViaFlags() && AreLitePagesEnabledViaFlags());
+}
+
 bool IsIncludedInServerExperimentsFieldTrial() {
   return !base::CommandLine::ForCurrentProcess()->HasSwitch(
              data_reduction_proxy::switches::
                  kDataReductionProxyServerExperimentsDisabled) &&
          FieldTrialList::FindFullName(kServerExperimentsFieldTrial)
                  .find(kDisabled) != 0;
 }
 bool IsIncludedInTamperDetectionExperiment() {
   return IsIncludedInServerExperimentsFieldTrial() &&
          base::StartsWith(
@@ skipping 375 matching lines @@
 std::string DataReductionProxyParams::GetDefaultFallbackOrigin() const {
   return kDefaultFallbackOrigin;
 }
 
 std::string DataReductionProxyParams::GetDefaultSecureProxyCheckURL() const {
   return kDefaultSecureProxyCheckUrl;
 }
 
 
 }  // namespace data_reduction_proxy