Enable the Push and Notification Service Worker events without a flag.

chrome/browser/services/gcm/push_messaging_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 <map>
 #include <string>
 
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/message_loop/message_loop.h"
@@ skipping 141 matching lines @@
 
 }  // namespace
 
 class PushMessagingBrowserTest : public InProcessBrowserTest {
  public:
   PushMessagingBrowserTest() : gcm_service_(nullptr) {}
   ~PushMessagingBrowserTest() override {}
 
   // InProcessBrowserTest:
   void SetUpCommandLine(base::CommandLine* command_line) override {
-    command_line->AppendSwitch(
-        switches::kEnableExperimentalWebPlatformFeatures);
     command_line->AppendSwitch(switches::kEnablePushMessagePayload);
     InProcessBrowserTest::SetUpCommandLine(command_line);
   }
 
   // InProcessBrowserTest:
   void SetUp() override {
     https_server_.reset(new net::SpawnedTestServer(
         net::SpawnedTestServer::TYPE_HTTPS,
         net::BaseTestServer::SSLOptions(
             net::BaseTestServer::SSLOptions::CERT_OK),
@@ skipping 622 matching lines @@
   if (IsPushSupported())
     return;
 
   std::string script_result;
   ASSERT_TRUE(RunScript("window.PushManager", &script_result));
   EXPECT_EQ("undefined", script_result);
 }
 #endif
 
 }  // namespace gcm