Plugin Power Saver: Make Unthrottle metric collection more consistent

content/public/renderer/plugin_instance_throttler.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 "content/public/renderer/plugin_instance_throttler.h"
-
-#include "content/renderer/pepper/plugin_instance_throttler_impl.h"
-
-namespace content {
-
-// static
-scoped_ptr<PluginInstanceThrottler> PluginInstanceThrottler::Get(
-    RenderFrame* frame,
-    const GURL& plugin_url,
-    PluginPowerSaverMode power_saver_mode) {
-  if (power_saver_mode == PluginPowerSaverMode::POWER_SAVER_MODE_ESSENTIAL)
-    return nullptr;
-
-  bool power_saver_enabled =
-      power_saver_mode ==
-      PluginPowerSaverMode::POWER_SAVER_MODE_PERIPHERAL_THROTTLED;
-  return make_scoped_ptr(
-      new PluginInstanceThrottlerImpl(frame, plugin_url, power_saver_enabled));
-}
-
-}  // namespace content