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

chrome/browser/ui/webui/options/content_settings_handler.cc

 // Copyright (c) 2012 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/ui/webui/options/content_settings_handler.h"
 
 #include <algorithm>
 #include <map>
 #include <vector>
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
-#include "base/command_line.h"
 #include "base/prefs/pref_service.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/utf_string_conversions.h"
 #include "base/values.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/chrome_notification_types.h"
 #include "chrome/browser/content_settings/web_site_settings_uma_util.h"
 #include "chrome/browser/custom_handlers/protocol_handler_registry.h"
 #include "chrome/browser/custom_handlers/protocol_handler_registry_factory.h"
 #include "chrome/browser/extensions/extension_special_storage_policy.h"
 #include "chrome/browser/notifications/desktop_notification_profile_util.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/ui/browser_list.h"
-#include "chrome/common/chrome_switches.h"
 #include "chrome/common/extensions/manifest_handlers/app_launch_info.h"
 #include "chrome/common/pref_names.h"
 #include "chrome/common/url_constants.h"
 #include "chrome/grit/generated_resources.h"
 #include "chrome/grit/locale_settings.h"
 #include "components/content_settings/core/browser/content_settings_details.h"
 #include "components/content_settings/core/browser/content_settings_utils.h"
 #include "components/content_settings/core/browser/host_content_settings_map.h"
 #include "components/content_settings/core/common/content_settings.h"
 #include "components/content_settings/core/common/content_settings_pattern.h"
 #include "components/google/core/browser/google_util.h"
+#include "components/plugins/common/plugins_field_trial.h"
 #include "components/signin/core/common/profile_management_switches.h"
 #include "components/user_prefs/user_prefs.h"
 #include "content/public/browser/notification_service.h"
 #include "content/public/browser/notification_source.h"
 #include "content/public/browser/notification_types.h"
 #include "content/public/browser/storage_partition.h"
 #include "content/public/browser/user_metrics.h"
 #include "content/public/browser/web_contents.h"
 #include "content/public/browser/web_ui.h"
 #include "content/public/common/content_switches.h"
@@ skipping 472 matching lines @@
   }
 }
 
 void ContentSettingsHandler::InitializePage() {
   media_settings_ = MediaSettingsInfo();
   RefreshFlashMediaSettings();
 
   UpdateHandlersEnabledRadios();
   UpdateAllExceptionsViewsFromModel();
   UpdateProtectedContentExceptionsButton();
+
+  // For Plugins, allow flag to override displayed content setting.
+  if (PluginsFieldTrial::EnableForcePluginPowerSaver()) {
+    web_ui()->CallJavascriptFunction(
+        "ContentSettings.disablePluginsAllowOption");
+  }
 }
 
 void ContentSettingsHandler::OnContentSettingChanged(
     const ContentSettingsPattern& primary_pattern,
     const ContentSettingsPattern& secondary_pattern,
     ContentSettingsType content_type,
     std::string resource_identifier) {
   const ContentSettingsDetails details(
       primary_pattern, secondary_pattern, content_type, resource_identifier);
   // TODO(estade): we pretend update_all() is always true.
@@ skipping 58 matching lines @@
     UpdateFlashMediaLinksVisibility();
   }
 }
 
 void ContentSettingsHandler::UpdateSettingDefaultFromModel(
     ContentSettingsType type) {
   std::string provider_id;
   ContentSetting default_setting =
       GetContentSettingsMap()->GetDefaultContentSetting(type, &provider_id);
 
-  // For Plugins, display the obsolete ASK setting as BLOCK.
-  if (type == ContentSettingsType::CONTENT_SETTINGS_TYPE_PLUGINS &&
-      default_setting == ContentSetting::CONTENT_SETTING_ASK) {
-    default_setting = ContentSetting::CONTENT_SETTING_BLOCK;
+  // For Plugins, allow flag to override displayed content setting.
+  // For Plugins, ASK is obsolete. Show as BLOCK to reflect actual behavior.
+  if (type == ContentSettingsType::CONTENT_SETTINGS_TYPE_PLUGINS) {
+    if (default_setting == ContentSetting::CONTENT_SETTING_ALLOW &&
+        PluginsFieldTrial::EnableForcePluginPowerSaver()) {
+      default_setting =
+          ContentSetting::CONTENT_SETTING_DETECT_IMPORTANT_CONTENT;
+    } else if (default_setting == ContentSetting::CONTENT_SETTING_ASK) {
+      default_setting = ContentSetting::CONTENT_SETTING_BLOCK;
+    }
   }
 
   base::DictionaryValue filter_settings;
   filter_settings.SetString(ContentSettingsTypeToGroupName(type) + ".value",
                             ContentSettingToString(default_setting));
   filter_settings.SetString(
       ContentSettingsTypeToGroupName(type) + ".managedBy", provider_id);
 
   web_ui()->CallJavascriptFunction(
       "ContentSettings.setContentFilterSettingsValue", filter_settings);
@@ skipping 997 matching lines @@
 
   // Exceptions apply only when the feature is enabled.
   PrefService* prefs = user_prefs::UserPrefs::Get(GetBrowserContext(web_ui()));
   bool enable_exceptions = prefs->GetBoolean(prefs::kEnableDRM);
   web_ui()->CallJavascriptFunction(
       "ContentSettings.enableProtectedContentExceptions",
       base::FundamentalValue(enable_exceptions));
 }
 
 }  // namespace options