Mark PortForwardingTest.LoadPageWithStyleAnsScript as flaky

chrome/browser/devtools/device/port_forwarding_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 "base/command_line.h"
 #include "base/compiler_specific.h"
 #include "base/prefs/pref_service.h"
 #include "base/strings/string_number_conversions.h"
 #include "chrome/browser/devtools/device/devtools_android_bridge.h"
 #include "chrome/browser/devtools/device/self_device_provider.h"
@@ skipping 54 matching lines @@
     void set_skip_empty_devices(bool skip_empty_devices) {
       skip_empty_devices_ = skip_empty_devices;
     }
 
    private:
     Profile* profile_;
     bool skip_empty_devices_;
   };
 };
 
+// Flaky on all platforms. https://crbug.com/477696
 IN_PROC_BROWSER_TEST_F(PortForwardingTest,
-                       LoadPageWithStyleAnsScript) {
+                       DISABLED_LoadPageWithStyleAnsScript) {
   Profile* profile = browser()->profile();
 
   AndroidDeviceManager::DeviceProviders device_providers;
   device_providers.push_back(new SelfAsDeviceProvider(kDefaultDebuggingPort));
   DevToolsAndroidBridge::Factory::GetForProfile(profile)->
       set_device_providers_for_test(device_providers);
 
   ASSERT_TRUE(test_server()->Start());
   GURL original_url = test_server()->GetURL(kPortForwardingTestPage);
 
@@ skipping 84 matching lines @@
   content::RunMessageLoop();
 
   self_provider->set_release_callback_for_test(
       base::Bind(&base::MessageLoop::PostTask,
                  base::Unretained(base::MessageLoop::current()),
                  FROM_HERE,
                  base::MessageLoop::QuitClosure()));
   wait_for_port_forwarding.reset();
   content::RunMessageLoop();
 }