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

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

Index: chrome/browser/ui/webui/options/content_settings_handler.cc
diff --git a/chrome/browser/ui/webui/options/content_settings_handler.cc b/chrome/browser/ui/webui/options/content_settings_handler.cc
index 562ea7cf2c59b810e42de1a2f39317f35fe350e0..4ead795080532a310f58ed56e9658b0bf0bee821 100644
--- a/chrome/browser/ui/webui/options/content_settings_handler.cc
+++ b/chrome/browser/ui/webui/options/content_settings_handler.cc
@@ -10,7 +10,6 @@
 
 #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"
@@ -24,7 +23,6 @@
 #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"
@@ -36,6 +34,7 @@
 #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"
@@ -528,6 +527,12 @@ void ContentSettingsHandler::InitializePage() {
   UpdateHandlersEnabledRadios();
   UpdateAllExceptionsViewsFromModel();
   UpdateProtectedContentExceptionsButton();
+
+  // For Plugins, allow flag to override displayed content setting.
+  if (PluginsFieldTrial::EnableForcePluginPowerSaver()) {
+    web_ui()->CallJavascriptFunction(
+        "ContentSettings.disablePluginsAllowOption");
+  }
 }
 
 void ContentSettingsHandler::OnContentSettingChanged(
@@ -606,10 +611,16 @@ void ContentSettingsHandler::UpdateSettingDefaultFromModel(
   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;