Use the Previews Black List for server previews

components/data_reduction_proxy/core/common/data_reduction_proxy_params.cc

Index: components/data_reduction_proxy/core/common/data_reduction_proxy_params.cc
diff --git a/components/data_reduction_proxy/core/common/data_reduction_proxy_params.cc b/components/data_reduction_proxy/core/common/data_reduction_proxy_params.cc
index 5e3cd12f13414510cf584f57c1cb057cd304e8ac..9792ab96ea48836a1f50cb7997b3f6d7864e7eec 100644
--- a/components/data_reduction_proxy/core/common/data_reduction_proxy_params.cc
+++ b/components/data_reduction_proxy/core/common/data_reduction_proxy_params.cc
@@ -45,6 +45,9 @@ const char kLitePageFallbackFieldTrial[] =
     "DataCompressionProxyLitePageFallback";
 const char kLoFiFlagFieldTrial[] = "DataCompressionProxyLoFiFlag";
 
+const char kBlackListTransitionFieldTrial[] =
+    "DataReductionProxyPreviewsBlackListTransition";
+
 const char kTrustedSpdyProxyFieldTrialName[] = "DataReductionTrustedSpdyProxy";
 
 // Default URL for retrieving the Data Reduction Proxy configuration.
@@ -60,7 +63,7 @@ const char kServerExperimentsFieldTrial[] =
     "DataReductionProxyServerExperiments";
 
 // LitePage black list version.
-const char kLitePageBlacklistVersion[] = "lite-page-blacklist-version";
+const char kLitePageBlackListVersion[] = "lite-page-blacklist-version";
 
 bool IsIncludedInFieldTrial(const std::string& name) {
   return base::StartsWith(FieldTrialList::FindFullName(name), kEnabled,
@@ -271,6 +274,12 @@ bool IsConfigClientEnabled() {
       kDisabled, base::CompareCase::SENSITIVE);
 }
 
+bool IsBlackListEnabledForServerPreviews() {
+  return base::StartsWith(
+      base::FieldTrialList::FindFullName(kBlackListTransitionFieldTrial),
+      kEnabled, base::CompareCase::SENSITIVE);
+}
+
 GURL GetConfigServiceURL() {
   base::CommandLine* command_line = base::CommandLine::ForCurrentProcess();
   std::string url;
@@ -319,7 +328,7 @@ bool ShouldForceEnableDataReductionProxy() {
 int LitePageVersion() {
   return GetFieldTrialParameterAsInteger(
       data_reduction_proxy::params::GetLoFiFieldTrialName(),
-      kLitePageBlacklistVersion, 0, 0);
+      kLitePageBlackListVersion, 0, 0);
 }
 
 int GetFieldTrialParameterAsInteger(const std::string& group,