Added data reduction proxy holdback experiment

components/data_reduction_proxy/browser/data_reduction_proxy_settings_unittest.cc

Index: components/data_reduction_proxy/browser/data_reduction_proxy_settings_unittest.cc
diff --git a/components/data_reduction_proxy/browser/data_reduction_proxy_settings_unittest.cc b/components/data_reduction_proxy/browser/data_reduction_proxy_settings_unittest.cc
index 28548827409f0d54e7503500d8d601accf29ebea..88f4567d681ebb9906b8655ed47ccb7120bd1f2b 100644
--- a/components/data_reduction_proxy/browser/data_reduction_proxy_settings_unittest.cc
+++ b/components/data_reduction_proxy/browser/data_reduction_proxy_settings_unittest.cc
@@ -44,7 +44,7 @@ TEST_F(DataReductionProxySettingsTest, TestGetDataReductionProxyOrigin) {
 TEST_F(DataReductionProxySettingsTest, TestGetDataReductionProxyDevOrigin) {
   CommandLine::ForCurrentProcess()->AppendSwitchASCII(
       switches::kDataReductionProxyDev, expected_params_->DefaultDevOrigin());
-  ResetSettings(true, true, false, true);
+  ResetSettings(true, true, false, true, false);
   std::string result =
       settings_->params()->origin().spec();
   EXPECT_EQ(GURL(expected_params_->DefaultDevOrigin()), GURL(result));
@@ -83,7 +83,7 @@ TEST_F(DataReductionProxySettingsTest, TestSetProxyConfigs) {
       drp_params.DefaultAltFallbackOrigin());
   CommandLine::ForCurrentProcess()->AppendSwitchASCII(
       switches::kDataReductionSSLProxy, drp_params.DefaultSSLOrigin());
-  ResetSettings(true, true, true, true);
+  ResetSettings(true, true, true, true, false);
   TestDataReductionProxyConfig* config =
       static_cast<TestDataReductionProxyConfig*>(
           settings_->configurator());
@@ -122,6 +122,21 @@ TEST_F(DataReductionProxySettingsTest, TestSetProxyConfigs) {
   EXPECT_EQ("", config->ssl_origin_);
 }
 
+TEST_F(DataReductionProxySettingsTest, TestSetProxyConfigsHoldback) {
+  ResetSettings(true, true, true, true, true);
+  TestDataReductionProxyConfig* config =
+      static_cast<TestDataReductionProxyConfig*>(
+          settings_->configurator());
+
+   // Holdback.
+  ResetSettings(true, true, true, true, true);
+  settings_->SetProxyConfigs(true, true, false, false);
+  EXPECT_TRUE(config->enabled_);
+  EXPECT_EQ("", config->origin_);
+  EXPECT_EQ("", config->fallback_origin_);
+  EXPECT_EQ("", config->ssl_origin_);
+}
+
 TEST_F(DataReductionProxySettingsTest, TestIsProxyEnabledOrManaged) {
   settings_->InitPrefMembers();
   base::MessageLoopForUI loop;
@@ -365,7 +380,7 @@ TEST_F(DataReductionProxySettingsTest, CheckInitMetricsWhenNotAllowed) {
   // Clear the command line. Setting flags can force the proxy to be allowed.
   CommandLine::ForCurrentProcess()->InitFromArgv(0, NULL);
 
-  ResetSettings(false, false, false, false);
+  ResetSettings(false, false, false, false, false);
   MockSettings* settings = static_cast<MockSettings*>(settings_.get());
   EXPECT_FALSE(settings->params()->allowed());
   EXPECT_CALL(*settings, RecordStartupState(PROXY_NOT_AVAILABLE));