Plugin Power Saver Tiny: Treat completely obscured plugins as Tiny.

chrome/browser/plugins/plugin_power_saver_browsertest.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 <stdint.h>
 #include <string>
 #include <utility>
 
 #include "base/command_line.h"
 #include "base/stl_util.h"
@@ skipping 551 matching lines @@
   LoadHTML("/zoom_independent.html");
   VerifyPluginIsThrottled(GetActiveWebContents(), "plugin");
 }
 
 IN_PROC_BROWSER_TEST_F(PluginPowerSaverBrowserTest, BlockTinyPlugins) {
   LoadHTML("/block_tiny_plugins.html");
 
   VerifyPluginMarkedEssential(GetActiveWebContents(), "tiny_same_origin");
   VerifyPluginIsPlaceholderOnly("tiny_cross_origin_1");
   VerifyPluginIsPlaceholderOnly("tiny_cross_origin_2");
+  VerifyPluginIsPlaceholderOnly("completely_obscured");
 
   TabSpecificContentSettings* tab_specific_content_settings =
       TabSpecificContentSettings::FromWebContents(GetActiveWebContents());
   EXPECT_FALSE(tab_specific_content_settings->blocked_plugin_names().empty());
 }
 
 IN_PROC_BROWSER_TEST_F(PluginPowerSaverBrowserTest, BackgroundTabTinyPlugins) {
   content::WebContents* background_contents =
       LoadHTMLInBackgroundTab("/background_tab_tiny_plugins.html");
   EXPECT_FALSE(PluginLoaded(background_contents, "tiny"));
@@ skipping 69 matching lines @@
 IN_PROC_BROWSER_TEST_F(PluginPowerSaverPreferHtmlBrowserTest,
                        ThrottlePluginsOnAllowContentSetting) {
   HostContentSettingsMap* content_settings_map =
       HostContentSettingsMapFactory::GetForProfile(browser()->profile());
 
   content_settings_map->SetDefaultContentSetting(CONTENT_SETTINGS_TYPE_PLUGINS,
                                                  CONTENT_SETTING_ALLOW);
   LoadPeripheralPlugin();
   VerifyPluginIsThrottled(GetActiveWebContents(), "plugin");
 }