Delete the NotificationActionIcons flag.

chrome/browser/notifications/platform_notification_service_browsertest.cc

 // Copyright 2014 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 <string>
 #include <vector>
 
 #include "base/command_line.h"
 #include "base/files/file_path.h"
 #include "base/memory/scoped_ptr.h"
@@ skipping 94 matching lines @@
 
 PlatformNotificationServiceBrowserTest::PlatformNotificationServiceBrowserTest()
     : server_root_(FILE_PATH_LITERAL("chrome/test/data")),
       // The test server has a base directory that doesn't exist in the
       // filesystem.
       test_page_url_(std::string("/") + kTestFileName) {}
 
 void PlatformNotificationServiceBrowserTest::SetUpCommandLine(
     base::CommandLine* command_line) {
   command_line->AppendSwitch(switches::kEnableExperimentalWebPlatformFeatures);
-  command_line->AppendSwitch(switches::kEnableNotificationActionIcons);
 
   InProcessBrowserTest::SetUpCommandLine(command_line);
 }
 
 void PlatformNotificationServiceBrowserTest::SetUp() {
   ui_manager_.reset(new StubNotificationUIManager);
   https_server_.reset(
       new net::EmbeddedTestServer(net::EmbeddedTestServer::TYPE_HTTPS));
   https_server_->ServeFilesFromSourceDirectory(server_root_);
   ASSERT_TRUE(https_server_->Start());
@@ skipping 365 matching lines @@
   EXPECT_EQ("actionTitle2", base::UTF16ToUTF8(notification.buttons()[1].title));
 
   notification.delegate()->ButtonClick(0);
   ASSERT_TRUE(RunScript("GetMessageFromWorker()", &script_result));
   EXPECT_EQ("action_button_click actionId1", script_result);
 
   notification.delegate()->ButtonClick(1);
   ASSERT_TRUE(RunScript("GetMessageFromWorker()", &script_result));
   EXPECT_EQ("action_button_click actionId2", script_result);
 }