Plugin Power Saver: Overhaul plugin-power-saver flags. Show in UI.

components/plugins/common/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 "components/plugins/common/plugins_field_trial.h"
+
+#include "base/command_line.h"
+#include "base/metrics/field_trial.h"
+#include "components/plugins/common/plugins_switches.h"
+
+bool PluginsFieldTrial::EnableForcePluginPowerSaver() {
+  const base::CommandLine* cl = base::CommandLine::ForCurrentProcess();
+  if (cl->HasSwitch(switches::kDisableForcePluginPowerSaver))
+    return false;
+  if (cl->HasSwitch(switches::kEnableForcePluginPowerSaver))
+    return true;
+
+  return base::FieldTrialList::FindFullName("ForcePluginPowerSaver") ==
+         "Enabled";
+}