Make DETECT_IMPORTANT_CONTENT the default Plugins content setting based

chrome/browser/plugins/plugins_field_trial.cc

-// 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 "chrome/browser/plugins/plugins_field_trial.h"
-
-#include "base/command_line.h"
-#include "base/metrics/field_trial.h"
-#include "chrome/common/chrome_switches.h"
-
-ContentSetting PluginsFieldTrial::EffectiveContentSetting(
-    ContentSettingsType type,
-    ContentSetting setting) {
-  if (type != CONTENT_SETTINGS_TYPE_PLUGINS)
-    return setting;
-
-  // For Plugins, ASK is obsolete. Show as BLOCK to reflect actual behavior.
-  if (setting == ContentSetting::CONTENT_SETTING_ASK)
-    return ContentSetting::CONTENT_SETTING_BLOCK;
-
-  // For Plugins, allow flag to override displayed content setting.
-  if (setting == ContentSetting::CONTENT_SETTING_ALLOW &&
-      IsForcePluginPowerSaverEnabled()) {
-    return ContentSetting::CONTENT_SETTING_DETECT_IMPORTANT_CONTENT;
-  }
-
-  return setting;
-}
-
-bool PluginsFieldTrial::IsForcePluginPowerSaverEnabled() {
-  const base::CommandLine* cl = base::CommandLine::ForCurrentProcess();
-  if (cl->HasSwitch(switches::kDisablePluginPowerSaver))
-    return false;
-  if (cl->HasSwitch(switches::kEnablePluginPowerSaver))
-    return true;
-
-  std::string group_name =
-      base::FieldTrialList::FindFullName("ForcePluginPowerSaver");
-  return !group_name.empty() && group_name != "Disabled";
-}