Remove all blimp engine code

blimp/engine/app/settings_manager.cc

-// Copyright 2016 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 <blimp/engine/app/settings_manager.h>
-#include "content/public/browser/render_view_host.h"
-#include "content/public/common/web_preferences.h"
-
-namespace blimp {
-namespace engine {
-
-SettingsManager::SettingsManager() {}
-
-SettingsManager::~SettingsManager() {}
-
-void SettingsManager::AddObserver(Observer* observer) {
-  observer_list_.AddObserver(observer);
-}
-
-void SettingsManager::RemoveObserver(Observer* observer) {
-  observer_list_.RemoveObserver(observer);
-}
-
-void SettingsManager::UpdateWebkitPreferences(content::WebPreferences* prefs) {
-  prefs->record_whole_document = settings_.record_whole_document;
-  prefs->animation_policy = settings_.animation_policy;
-  prefs->viewport_meta_enabled = settings_.viewport_meta_enabled;
-  prefs->default_minimum_page_scale_factor =
-      settings_.default_minimum_page_scale_factor;
-  prefs->default_maximum_page_scale_factor =
-      settings_.default_maximum_page_scale_factor;
-  prefs->shrinks_viewport_contents_to_fit =
-      settings_.shrinks_viewport_contents_to_fit;
-  prefs->use_solid_color_scrollbars = true;
-}
-
-const EngineSettings& SettingsManager::GetEngineSettings() const {
-  return settings_;
-}
-
-void SettingsManager::UpdateEngineSettings(const EngineSettings& settings) {
-  EngineSettings old_settings = settings_;
-  settings_ = settings;
-
-  if (settings_.record_whole_document != old_settings.record_whole_document) {
-    // Notify the observers that the web preferences have changed.
-    for (auto& observer : observer_list_)
-      observer.OnWebPreferencesChanged();
-  }
-}
-
-}  // namespace engine
-}  // namespace blimp