Make DETECT_IMPORTANT_CONTENT the default Plugins content setting based

components/content_settings/core/browser/plugins_field_trial_unittest.cc

Index: components/content_settings/core/browser/plugins_field_trial_unittest.cc
diff --git a/components/content_settings/core/browser/plugins_field_trial_unittest.cc b/components/content_settings/core/browser/plugins_field_trial_unittest.cc
new file mode 100644
index 0000000000000000000000000000000000000000..052f8a5b39cd0290c2c6b9703a267cd6baa72c33
--- /dev/null
+++ b/components/content_settings/core/browser/plugins_field_trial_unittest.cc
@@ -0,0 +1,97 @@
+// Copyright 2015 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/content_settings/core/browser/plugins_field_trial.h"
+
+#include "base/command_line.h"
+#include "base/macros.h"
+#include "base/metrics/field_trial.h"
+#include "base/test/mock_entropy_provider.h"
+#include "components/content_settings/core/browser/content_settings_default_provider.h"
+#include "components/content_settings/core/common/content_settings.h"
+#include "components/content_settings/core/common/pref_names.h"
+#include "components/plugins/common/plugins_switches.h"
+#include "components/pref_registry/testing_pref_service_syncable.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace content_settings {
+
+namespace {
+
+const auto& kFieldTrialName = PluginsFieldTrial::kFieldTrialName;
+
+void ForceFieldTrialGroup(const std::string& group_name) {
+  using base::FieldTrialList;
+  ASSERT_TRUE(FieldTrialList::CreateFieldTrial(kFieldTrialName, group_name));
+}
+
+}  // namespace
+
+class PluginsFieldTrialTest : public testing::Test {
+ public:
+  PluginsFieldTrialTest() : field_trial_list_(new base::MockEntropyProvider) {}
+
+ private:
+  base::FieldTrialList field_trial_list_;
+
+  DISALLOW_COPY_AND_ASSIGN(PluginsFieldTrialTest);
+};
+
+TEST_F(PluginsFieldTrialTest, DisabledByDefault) {
+  base::CommandLine* cl = base::CommandLine::ForCurrentProcess();
+  ASSERT_FALSE(cl->HasSwitch(plugins::switches::kDisablePluginPowerSaver));
+  ASSERT_FALSE(cl->HasSwitch(plugins::switches::kEnablePluginPowerSaver));
+  ASSERT_FALSE(base::FieldTrialList::TrialExists(kFieldTrialName));
+  EXPECT_FALSE(PluginsFieldTrial::IsPluginPowerSaverEnabled());
+}
+
+TEST_F(PluginsFieldTrialTest, FieldTrialEnabled) {
+  ForceFieldTrialGroup("Enabled");
+  EXPECT_TRUE(PluginsFieldTrial::IsPluginPowerSaverEnabled());
+}
+
+TEST_F(PluginsFieldTrialTest, FieldTrialDisabled) {
+  ForceFieldTrialGroup("Disabled");
+  EXPECT_FALSE(PluginsFieldTrial::IsPluginPowerSaverEnabled());
+}
+
+TEST_F(PluginsFieldTrialTest, SwitchEnabled) {
+  base::CommandLine* cl = base::CommandLine::ForCurrentProcess();
+  cl->AppendSwitch(plugins::switches::kEnablePluginPowerSaver);
+  EXPECT_TRUE(PluginsFieldTrial::IsPluginPowerSaverEnabled());
+}
+
+TEST_F(PluginsFieldTrialTest, SwitchDisabled) {
+  base::CommandLine* cl = base::CommandLine::ForCurrentProcess();
+  cl->AppendSwitch(plugins::switches::kDisablePluginPowerSaver);
+  EXPECT_FALSE(PluginsFieldTrial::IsPluginPowerSaverEnabled());
+}
+
+TEST_F(PluginsFieldTrialTest, SwitchOverridesFieldTrial1) {
+  ForceFieldTrialGroup("Disabled");
+  base::CommandLine* cl = base::CommandLine::ForCurrentProcess();
+  cl->AppendSwitch(plugins::switches::kEnablePluginPowerSaver);
+  EXPECT_TRUE(PluginsFieldTrial::IsPluginPowerSaverEnabled());
+}
+
+TEST_F(PluginsFieldTrialTest, SwitchOverridesFieldTrial2) {
+  ForceFieldTrialGroup("Enabled");
+  base::CommandLine* cl = base::CommandLine::ForCurrentProcess();
+  cl->AppendSwitch(plugins::switches::kDisablePluginPowerSaver);
+  EXPECT_FALSE(PluginsFieldTrial::IsPluginPowerSaverEnabled());
+}
+
+TEST_F(PluginsFieldTrialTest, NoPrefLeftBehind) {
+  ForceFieldTrialGroup("Enabled");
+  user_prefs::TestingPrefServiceSyncable prefs;
+  {
+    DefaultProvider::RegisterProfilePrefs(prefs.registry());
+    DefaultProvider default_provider(&prefs, false);
+  }
+  EXPECT_EQ(CONTENT_SETTING_DETECT_IMPORTANT_CONTENT,
+            prefs.GetInteger(prefs::kDefaultPluginsSetting));
+  EXPECT_FALSE(prefs.HasPrefPath(prefs::kDefaultPluginsSetting));
+}
+
+}  // namespace content_settings